Independence Hall

Both the Declaration of Independence, 1776, and the Constitution of the United States, 1787, were discussed, adopted, and signed at this building which as a result became a symbol of freedom and democracy and a very important step in the American history that later had significant impacts on lawmakers, political thinkers and governmental charters around the world. This fact gave the building a direct association with events and ideas of outstanding universal significance fulfilling the criterion (vi) and designating it into a UNESCO World Heritage Site in 1979. The site is managed, as a part of Independence National Historical Park, at a national level by the National Park Service Organic Act of 1916, which united the individual national parks' management and aims for the preservation of historic sites for public enjoyment and education for future generations. The 1948 law, by President Harry S. Truman, created the Independence National Historical Park consisting of the Independence Hall, Congress Hall, the Liberty Bell, and other historic buildings important for the nation. This inclusion increased the protection level and the World Heritage Status of Independence Hall to the highest level as the National Park system is maintained by the federal government. The National Historic Preservation Act of 1966 provides a framework for the preservation of historic properties and encourages federal agencies to consider the effects of their undertakings on historic sites. "Access at all reasonable times to all public portions of the property," and that "no changes or alterations should be made in...its buildings and grounds... except by mutual agreement between the Secretary of the Interior and the [City of Philadelphia]..." The comprehensive General Management Plan for Independence National Historical Park, developed by the National Park Service, addresses interpretation, visitor management, conservation efforts, carrying capacity issues, and the maintenance of the site's historical integrity. They organize the balance between public access and the protection of the building's physical and historical resources. Sustaining integrity, authenticity and the outstanding universal value of the building, as UNESCO also indicates, will require managing the degradation due to environmental factors like pollutants, and anthropogenic factors like the number of visitors, urban development plans and the level of interventions which are limited to structural stabilization. ==Preparation for construction==

In spring 1729, proposals were submitted to build a state house in Philadelphia, then the capital of the Province of Pennsylvania. Approximately 2,000 pounds sterling was committed to the project, and a committee including Thomas Lawrence, John Kearsley, and Andrew Hamilton was charged with selecting a site for the building's construction, acquiring plans for it, and contracting a company for its construction. Hamilton and his future son-in-law William Allen, who was later chief justice of the Province of Pennsylvania, were named trustees and were authorized to purchase land for the proposed state house. By October 1730, they purchased lots on Chestnut Street for the building. The site was originally a slightly sloping, vegetation covered site at the outskirts of the city which used to be a camp for American Indians. The State House was more suburban than urban. By 1732, Hamilton acquired the deed for Lot no. 2 from surveyor David Powell, who was paid for his work on the lot. But tensions began arising among committee members. Kearsley and Hamilton disagreed on a number of issues concerning the state house. Kearsley, who designed Christ Church and St. Peter's Church in Philadelphia, had plans for the design, but so did Hamilton. The two men also disagreed on where in Philadelphia the building should be located; Kearsley sought to have it constructed on High Street, which is present-day Market Street, and Hamilton favored Chestnut Street. Lawrence said nothing on the matter of its location. The disagreements escalated to the point where arbitration was needed. On August 8, 1733, Hamilton brought the matter before the Provincial Assembly, where he explained that Kearsley did not approve of his plans for the state house's location and architecture and argued that the assembly did not agreed to these decisions either. Three days later, Hamilton appeared before the assembly, where he showed his plans for the state house, which accepted them. On August 14, the assembly sided with Hamilton, granting him full authority over the project, and the current site on the south side of Chestnut Street between Fifth and Sixth Streets, its current location, the site where it would be constructed. Ground was broken for construction soon after. A foundation of rubble stone and lime mortar was done into the sandy clay soil. Then the interior frame and roof trusses were constructed with wooden girders and beams. They used reinforced joints and iron plates and pins. The outer shell was built from a hard-burned brick of 22 to 23 inches thickness. ==Structure==

Independence Hall has a red brick façade, designed in Georgian style. It consists of a central building with belltower and steeple, attached to two smaller wings via arcaded hyphens. The highest point to the tip of the steeple spire is above the ground. The State House was built between 1732 and 1753, designed by Edmund Woolley and Andrew Hamilton, and built by Woolley. Its construction was commissioned by the Pennsylvania colonial legislature which paid for construction as funds were available, so it was finished piecemeal. It was initially inhabited by the colonial government of Pennsylvania as its State House, from 1732 to 1799. In 1752, when Isaac Norris was selecting a man to build the first clock for the State House he chose Thomas Stretch, the son of Peter Stretch his old friend and fellow council member, to do the job. In 1753, Stretch erected a giant clock at the building's west end that resembled a tall clock (grandfather clock). The limestone base was capped with a wooden case surrounding the clock's face, which was carved by cabinetmaker Samuel Harding. The clock was removed about 1830. The clock's dials were mounted at the east and west ends of the main building connected by rods to the clock movement in the middle of the building. A new clock was designed and installed by Isaiah Lukens in 1828. The Lukens clock ran consecutively for eight days, "with four copper dials on each side that measured eight feet in diameter and clockworks that ensured sufficient power to strike the four-thousand pound bell made by John Wilbank." The Lukens clock remained in Independence Hall until 1877. The acquisition of the original clock and bell by the Pennsylvania Colonial Assembly is closely related to the acquisition of the Liberty Bell. By mid-1753, the clock was installed in the State House attic, but it was six years before Thomas Stretch received any pay for it. Demolition and reconstruction While the shell of the central portion of the building is original, the side wings, steeple and much of the interior were reconstructed much later. In 1781, the Pennsylvania Assembly had wooden steeple removed from the main building. The steeple rotted and weakened to a dangerous extent by 1773. By 1781, the Assembly had it removed and had the brick tower covered with a hipped roof. A more elaborate steeple, designed by William Strickland, was added in 1828. The original wings and hyphens (connecting corridors) were demolished and replaced in 1812. In 1898, these were in turn demolished and replaced with reconstructions of the original wings. The building was renovated numerous times in the 19th and 20th century. The current interior is a mid-20th-century reconstruction by the National Park Service with the public rooms restored to their 18th-century appearance. During the summer of 1973, a replica of the Thomas Stretch clock was restored to Independence Hall. Two smaller buildings adjoin the wings of Independence Hall: Old City Hall to the east, and Congress Hall to the west. These three buildings are together on a city block known as Independence Square, along with Philosophical Hall, the original home of the American Philosophical Society. Since its construction in the mid-20th century, to the north has been Independence Mall, which includes the current home of the Liberty Bell. Liberty Bell (foreground) was housed in the highest chamber of the brick tower from the 1780s until the 1850s The lowest chamber of the original wooden steeple was the first home of the Liberty Bell. When that steeple was removed in the 1780s, the bell was lowered into the highest chamber of the brick tower, where it remained until the 1850s. The much larger Centennial Bell, created for the Centennial Exposition in Philadelphia in 1876, hangs in the cupola of the 1828 steeple. The Liberty Bell, with its distinctive crack, was displayed on the ground floor of the hall from the 1850s until 1976, and is now on display across the street in the Liberty Bell Center. Assembly Room and Constitution were both authored and adopted in 1776 and 1787, respectively The Assembly Room is the heart of Independence Hall, and is the room where the Declaration of Independence and the Constitution were signed. ==Historical events==

The history of the Independence Hall can be divided into four periods: first construction and function as the Pennsylvania State House from 1732 to 1799, used as a museum from 1802 to 1828, became a municipal building from 1818 to 1895, and turned into an important historical landmark from 1898 to present. Declaration of Independence and Second Continental Congress '', a 1795 portrait by Robert Edge Pine depicting the Assembly Room in present-day Independence Hall during the American Revolution From May 10, 1775, to 1783, the Pennsylvania State House served as the principal meeting place of the Second Continental Congress, a body of representatives from each of the thirteen British North American colonies. On June 14, 1775, delegates of the Continental Congress, gathered in the Assembly Room of the Pennsylvania State House, established the Continental Army and appointed George Washington. The Congress appointed Benjamin Franklin as the first Postmaster General of what later became the United States Post Office Department slightly over a month later, on July 26. On July 4, 1776, the Declaration of Independence was unanimously approved in present-day Independence Hall. The Declaration was read aloud to the public in the area now known as Independence Square. This document unified the colonies in North America who declared themselves independent of the Kingdom of Great Britain and explained their justifications for doing so. These historic events are celebrated annually with a national holiday for U.S. Independence Day. There are 56 signatures on the Declaration of Independence, including John Hancock who signed first, writing his name in very large letters. The prominence of this signature led to the term "John Hancock" or "Hancock" becoming a colloquial term in the United States for one's signature. The Congress continued to meet in the Pennsylvania State House until December 12, 1776, Following the Pennsylvania Mutiny of 1783, Congress moved from Philadelphia again in June 1783, convening in Princeton, New Jersey, and eventually in several other cities prior to completion of the national capital of Washington, D.C. in 1800. Lincoln's funeral train, known as the "Lincoln Special", left Harrisburg, Pennsylvania, on Saturday, April 22, 1865, at 11:15 am and arrived at Philadelphia at Broad Street Station that afternoon at 4:30 pm. It was carried by hearse past a crowd of 85,000 people and was held in state in the Assembly Room in the east wing of Independence Hall. While there, it was escorted and guarded by a detail of 27 naval and military officers. That evening, a private viewing was arranged for honored guests of the mourners. The next day, (Sunday, April 23, 1865) lines began forming at 5:00 am. Over 300,000 mourners viewed the body – some waiting 5 hours just to see him. The Lincoln Special left Philadelphia's Kensington Station for New York City the next morning, on Monday, April 24, 1865, at 4:00 am. League to Enforce Peace The symbolic use of the hall was illustrated on June 17, 1915, where the League to Enforce Peace was formed here with former President William Howard Taft presiding. They proposed an international governing body under which participating nations would commit to "jointly...use...their economic and military forces against any one of their number making war against another" and "to formulate and codify rules of international law". ==Preservation==

'', an 1822 self-portrait by Charles Willson Peale depicting his museum at Pennsylvania State House, now Independence Hall, with the Long Room in the background The original steeple was demolished in 1781 due to structural problems. The wings and hyphens were demolished in 1812 and replaced by larger buildings designed by architect Robert Mills and a new, more elaborate steeple designed by William Strickland, constructed in 1828. The north entrance was also rebuilt during this period. From 1802 to 1827, artist Charles Willson Peale housed his Philadelphia Museum of natural history specimens, including the skeleton of a mastodon, and portraits of famous Americans, on the second floor of the Old State House and in the Assembly Room. In early 1816, the Commonwealth of Pennsylvania sold the State House to the City of Philadelphia, with a contract signed by the governor. The tower and the steeple were added in 1750. The original wooden tower was removed in 1781 even though it was distinguished that it has rotten in 1773. So, in 1828 as the city was restoring the building to its original state, William Strickland was hired to restore the original steeple. Instead of following the original design, he incorporated a clock and additional ornamentation. Currently, most of the original wood and brick are remaining. The steeple was strengthened by installing a new internal steel tower designed to fit within the framework of the historic timber structure in the 20th century for the tower's stability by Structural engineering firm Keast & Hood after core sampling and non-destructive stress testing. However, the tower suffered from water infiltration, and weather conditions leading to wood decay, rusting of iron components and deterioration. The structural framing of Stricklands design was revealed in the process of removing the tower's exterior during the repair and restoration of the tower from 2010 to 2012 by the American Recovery and Reinvestment Act. Some wood and nails and damaged brick masonry were replaced, the window sashes, doors, frames, and doors were restored and repainted, glass faces of the clock were replaced, building elevations were braced, historic copper urns were refurbished, new flashings was installed and caulking administered to prevent water infiltration, more modern lighting protection system technology was added, new wooden roofing shingles were installed, and supporting weathervane structures were replaced with gold leaf. The restoration overall had minimum interventions and preserved as much original material as possible. New materials and interventions were distinguishable and compatible with the original historic fabric. They also allowed future modifications to be made if necessary, showing reversibility. So, the tower's integrity was restored, ensuring its preservation for future generations. From 2017 to 2018 the North facade's stonework was taken under restoration, by the Tradesmen Group LLC who was selected by the National Park Service, due to weathering and environmental factors. The restoration included repointing of failed and deficient mortar joints in brick and stone masonry, repairing and patching the damaged stone fractures, cleaning soiled masonry using specialized poultice treatments, limited stone replacement with matching materials for compatibility, installing new lead sheet flashing on window keystones, and replacing the iron stone cramps in the North entrance stone steps with new molten lead. Again, minimum interventions were done on the most necessary elements. The new materials introduced were distinguishable and compatible with the original ones. And the process was done in a reversible manner as much as it can be. As a result, the facade's structural integrity was restored, enhancing both its appearance and durability. The bell that was once used at the clock tower became too fragile to use so it was named the Liberty Bell and put on display in Liberty Hall's foyer. Instead of repairing it, it was being showcased in its current state. Independence Hall and the Liberty Bell are now protected in a secure zone with entry at security screening buildings. Following the September 11, 2001 attacks, as part of a national effort to safeguard historical monuments by the United States Department of Homeland Security, pedestrian traffic around Independence Square and part of Independence Mall was restricted by temporary bicycle barriers and park rangers. In 2006, the National Park Service proposed installing a seven-foot security fence around Independence Hall and bisecting Independence Square, a plan that met with opposition from Philadelphia city officials, Pennsylvania Governor Ed Rendell, and Senator Arlen Specter. As of January 2007, the National Park Service plan was revised to eliminate the fence in favor of movable bollards and chains, and also to remove at least some of the temporary barriers to pedestrians and visitors. There is an ongoing restoration project called the Independence Square Improvement Project that started in 2025 and planned to finish in 2026 by the National Park Service, Historic Preservation Training Center and the Historic Architecture, Conservation and Engineering Center. It includes the Independence Hall, Congress Hall and the Old City Hall. Enhancing the accessibility and rehabilitating the building for the 250th anniversary of the Declaration of Independence which it symbolizes alongside the main concept of preserving the historic structure is the main purpose behind this project. In terms of accessibility new ramps are being designed and constructed. Masonry, monument, interior and exterior wood element restorations are also under work. The interior plaster is being repaired, and the metal finishes are being preserved. According to old sources and investigations historically accurate paint finishes are being applied to the ceilings, walls and trim. All of these will be done with minimum interventions that are distinguishable, compatible and reversible to preserve the integrity of the historic fabric and enhance the visitor experience. In general, increased number of visitors and environmental pollutants, such as acid rain, have contributed to the degradation of the building's materials. The large number of visitors and surrounding urban development have also posed challenges to the site's preservation. The National Park Service has implemented measures to manage visitor impact, including visitor screening and enhanced security systems. Additionally, a drainage improvement project was undertaken to address water accumulation issues in Independence Square, which could affect the building's foundation. ==Legacy==

, which has portrayed Independence Hall since 1928 On July 16, 1987, Congress met at Independence Hall in an unprecedented joint meeting outside of Washington, to commemorate the 200th anniversary of the Connecticut Compromise that determined the structure of Congress during the Constitutional Convention. The 1989 film A More Perfect Union, which portrays the events of the 1787 Constitutional Convention, was largely filmed in Independence Hall. Because of its symbolic history, Independence Hall has been used in more recent times as a venue for speeches and protests in support of democratic and civil rights movements. On October 26, 1918, Tomáš Masaryk proclaimed the independence of Czechoslovakia on the steps of Independence Hall. National Freedom Day, which commemorates the struggles of African Americans for equality and justice, has been celebrated at Independence Hall since 1942. On Independence Day, July 4, 1962, President John F. Kennedy gave an address there. Annual demonstrations organized by the East Coast Homophile Organizations advocating for gay rights were held in front of Independence Hall each July 4 from 1965 to 1969. Independence Hall has been pictured on the back of the U.S. $100 bill since 1928, and was depicted on the 1975–76 bicentennial Kennedy half dollar. The Assembly Room is pictured on the reverse of the U.S. two-dollar bill, from the original John Trumbull portrait, Declaration of Independence. Replicas in Dearborn, Michigan, one of several replicas of Independence Hall Independence Hall served as the model for the Pennsylvania Building at the 1893 World's Columbian Exposition, the Pennsylvania Building at the 1907 Jamestown Exposition, and the Pennsylvania Pavilion at the 1939 New York World's Fair. Dozens of structures replicating or loosely inspired by Independence Hall's iconic design have been built elsewhere in the United States, including a brick-by-brick replica across from Knott's Berry Farm in Buena Park, California. File:Birch's Views Plate 23.jpg|Independence Hall in 1799, with the wooden steeple removed File:Governor's Council Chamber, Independence Hall.jpg|The Governor's Council Chamber File:Supreme Court Room, Independence Hall.jpg|The Supreme Court Room File:Independence Hall, interior.jpg|Tower Stair Hall File:1926 $2 1-2 Sesquicentennial (rev).jpg|The reverse of the 1926 United States Sesquicentennial quarter-eagle features Independence Hall File:Independence Hall 1956 Issue-10c.jpg|A 1956 stamp issued by the U.S. Postal Service File:American Revolution Bicentennial Independence Hall 10c 1974 issue U.S. stamp.jpg|A 1974 stamp issued by the U.S. Postal Service File:1976-S 50C Clad Deep Cameo (rev).jpg|The reverse side of a Kennedy half dollar, featuring Independence Hall and issued in 1975 and 1976 to commemorate John F. Kennedy, the 35th U.S. president who was assassinated in 1963 File:US $2 bill reverse series 2003 A.jpg|A U.S. $2 bill, issued in 2003, featuring the Committee of Five presenting its draft of the Declaration of Independence to the Second Continental Congress ==See also==