This area was occupied for thousands of years by indigenous peoples. The historic
Passamaquoddy, an Algonquian-speaking people of the
Wabanaki Confederacy, was predominant in this area at the time of European encounter and settlement. The St. Croix River and its area were first explored by the French
Samuel de Champlain when he and his men spent a winter on
St. Croix Island in 1604. The first permanent settler was Daniel Hill of
Jonesboro, who arrived in 1779 during the
American Revolutionary War, when this was still part of Massachusetts. With other settlers, he built the first
sawmill in 1782. On June 27, 1789, the
Massachusetts General Court sold the township to Waterman Thomas for 19¢ an acre (0.4 hectares) (approx. $2.86 an acre in 2018 dollars). Early occupations in the settlement included
farming,
hunting and
ship building. On June 16, 1809, Plantation Number 5 PS was incorporated as Calais after
Calais,
France, in honor of
French assistance during the
American Revolution. The river provided the
mill town with
water power for industry, which included sawmills,
clapboard and
shingle mills, two
planing mills, a
saw factory, two
axe factories and four
grain mills. There were
foundries,
machine shops,
granite works,
shoe factories and a
tannery. Other businesses produced
bricks,
bedsteads,
brooms,
carriages and
plaster. The relationship between Calais and the neighboring Canadian town of St. Stephen has been remarkably close, over a period of many years. As evidence of the longtime friendship between the towns a likely apocryphal story is told that during the War of 1812, the British military provided St. Stephen with a large supply of gunpowder for protection against the enemy Americans in Calais, but St. Stephen's town elders gave the gunpowder to Calais for its Fourth of July celebrations. Calais is the home of the first railroad built in the state of Maine, the Calais Railroad, incorporated by the state legislature on February 17, 1832. It was built to transport lumber from a mill on the St. Croix River opposite
Milltown, New Brunswick, to the tidewater at Calais in 1835. In 1849, the name was changed to the Calais & Baring Railroad, and the line was extended farther to
Baring. In 1870, it became part of the St. Croix & Penobscot Railroad. Calais was incorporated as a city on August 24, 1850. On July 18, 1864,
Confederate agents crossed the border from
New Brunswick and attempted to rob a bank in Calais. The
Calais Free Library was designed by
Boston architect
Arthur H. Vinal and opened on July 4, 1893. The
Romanesque Revival building was listed on the
National Register of Historic Places in 2001. Other places in Calais listed on the National Register of Historic Places are the Calais Historic District, Calais Residential Historic District, Devils Head Site,
Gilmore House,
Thomas Hamilton House,
Hinckley Hill Historic District,
Holmes Cottage,
Dr. Job Holmes House,
Theodore Jellison House,
Pike's Mile Markers,
St. Anne's Episcopal Church,
George Washburn House and
Whitlocks Mill Light. File:Main Street, Calais, ME.jpg|Main Street in 1913 File:Calais Avenue, Calais, ME.jpg|Calais Avenue File:International Bridge, Calais, ME.jpg|International Bridge in 1913 File:Looking East from Bridge, Calais, ME.jpg|Looking east from bridge in 1908 ==Geography==