The church building was designed between 1870 and 1872 by the Boston architectural firm of
Cummings and Sears in the
Venetian Gothic style. The style follows the precepts of the British cultural theorist and architectural critic
John Ruskin (1819–1900) as outlined in his treatise
The Stones of Venice. Old South Church in Boston remains one of the most significant examples of Ruskin's influence on American architecture. The architects,
Charles Amos Cummings and
Willard T. Sears, also designed the
Isabella Stewart Gardner Museum. The exterior of the church is primarily built of
Roxbury Conglomerate commonly called puddingstone. Many arches, and several walls of stone, are striped with alternating courses of yellow-beige and deep red sandstone. The porticos and large open arches in the
campanile are decorated with simple
plate tracery. The upper arches of the porticos are decorated with screens of ornate
wrought iron. The building is
roofed in alternating bands of red and dark gray slate and the roofline finished with ornamental iron cresting.
Campanile in
Venice, Italy. A tall tower, or
campanile, is the trademark feature of Old South and is visible from several Boston neighborhoods. The tower, on the western end of the church, rises to a height of 246' and houses the church's 2,020-pound bell. This is the second campanile built on the same site, designed by Allen & Collens it is similar to the 1875 design in its use of Moorish arches. The first tower, completed in 1875 along with the present Narthex and sanctuary, had begun to list by the late 1920s. The cause was determined to be the faulty footings and piles anchored in the soft former swampland. They were insufficient for the load of the tower. The congregation engaged the architectural firm of Allen & Collens to design a replacement campanile and a new chapel to be named in memory of the Reverend George Angier Gordon. The tower was dismantled, and early 1930s technology of steam shovel and steel pilings provided a lasting solution. Today, the pitch and height of the tower are tested annually and records attest to its enduring stability. The bell wheel, which by motion of a heavy rope swings the large bell, had deteriorated by the late 20th century requiring that the bell be rung by an external hammer. A faithful reconstruction of the original 1931 bell wheel, installed in early fall 2006, returned Old South's bell to "full swing."
Lantern Centered above the Sanctuary on the east side of the church is a copper clad cupola surrounded by twelve ornate gothic arched windows. This feature is reminiscent of the cupolas of the
Basilica of St. Mark in Venice. While the lantern provides a striking visual presence, it was also built with function in mind. In the days before mechanical fans and air conditioning, a series of mechanically operated louvers allowed for window panels to be opened to help cool the sanctuary inside.
Decorative arts The interior of Old South is exuberant yet quietly modulates the mix of rich materials: highly carved Italian cherry woodwork, limestone, stenciled plaster, and stained glass. The sanctuary is entered from the
narthex through a screen carved in the Venetian Gothic style from French
Caen limestone. Hidden among the carved foliage that decorates the screen can be found a squirrel, lizard, owl, and snail. A similar theme of animals is also found in the carving of the building's exterior. The interior of the
chancel at the east end of the church, behind the choir, is faced by a running screen of wooden arches with
quatrefoil lunettes adapted from the upper arcade of the
Doge's Palace in Venice. The stained glass windows are by the English stained glass manufacturers
Clayton and Bell and were produced in the style of 15th-century English glass.
1875 Cummings and Sears interior '' limestone When Old South's church opened in 1875 it looked very much as it does today, based upon the design of Cummings and Sears. The walls were decorated in
polychrome stenciling in shades of complex tertiary colors: a
rose madder background with overlays of ochre, bay leaf green, warm gray, and persimmon, and highlights of metallic gold. Most of the interior structure, except for the carved wood frieze along the balconies, was already in place by 1875. High above the crossing of the transepts and nave is the lantern, or cupola. The ceiling of the lantern was painted a deep
Prussian blue with a pattern of gilded stars to represent the
firmament of God. The limestone tracery of the west wall of the sanctuary, with its foliage and animals, combined with the highly carved foliated woodwork and the overhead representation of the nighttime sky was intended to echo God's creation. Above the doors on the east chancel walls are glass mosaics of the tree of life by
Antonio Salviati. A third mosaic by Salviati originally hung in the
tympanum above the tower's front doors. That mosaic was relocated to the vestibule when the tower was rebuilt 1922–1937. The combined effect was extremely rich; at once a spiritual and sensuous experience, and in great contrast to the chaste interior of Old South Meeting House on Washington Street. Stylistically the 1875 interior was in harmony with the Ruskinian Gothic exterior, and expressed Ruskin's ideal that it is "in art that the heart, the head, and the hand of a man come together."
1905 Tiffany interior In 1905 the congregation engaged
Louis Comfort Tiffany to redecorate the sanctuary. Tiffany headed a group of artisans called the Associated Artists who worked largely in a style now described as the
Aesthetic Movement. Tiffany was a part of an emerging American view of design in the United States, increasingly taking fewer cues from Europe. Tiffany had decorated Mark Twain's home in Hartford, Connecticut, the state rooms at the
White House, and several Back Bay homes. In some ways Tiffany was an expected choice to redecorate Old South. He followed many of the ideas of John Ruskin; he believed in the dignity and importance of the human hand and eye in the decorative arts. Yet Tiffany arrived at Old South at a time when his gilded age style had begun a decline. A new wave of neoclassicism called
Beaux-Arts, and the
Colonial Revival style were replacing Victorian ornament with a simpler classicism. Theodore Roosevelt's 1902 White House renovation removed all of the Tiffany influence. In Tiffany's redecoration, Old South's stained glass windows were covered by insets of translucent tinted purple glass. The original polychrome stenciled plaster walls were painted purple, then stenciled in a series of geometric patterns with metallic silver paint intended to appear as mother of pearl inlay. Similar to Tiffany's work at Mark Twain's Hartford, Connecticut home, or his design for the White House's
Red Room. The resulting work at Old South was a highly ornamented visual experience, unified by a limited color palette.
1950s minimalism of the sanctuary is based on the upper arcade of the
Doge's Palace, Venice. In the early 1950s, possibly influenced by the minimalism of the
International Style, a second renovation of the Sanctuary took place. The mid-20th-century renovation largely ignored the architectural history of the church. Louis Comfort Tiffany's paint and stenciling was obscured by a coat of light gray paint, and the purple Tiffany glass installed over the stained glass was removed. The
oculus of the cupola was closed up. In some ways the removal of decoration recalled the congregation's
Puritan roots.
Recognition and restoration Old South Church's building was designated a U.S.
National Historic Landmark in 1970. In 1984 a research-driven restoration was begun. The period of the building's construction was adopted, using old photographs and engravings as sources, and paint analysis to replicate original colors, the interior spaces were returned closely to their 1875 appearance. Walls were repainted rose madder and the original Cummings and Sears' stencil patterns were recreated. The cupola was reopened, once more admitting light to the Sanctuary below. Polychrome stenciling repeated the original palette of ochre, bay leaf green, warm gray, and persimmon with metallic gold. ==Organ==