During the 19th century, the program of restoration and preservation had been concerned largely with work on Independence Hall, little thought having been given to the entire group of historical structures on the square. In fact, according to an act of the General Assembly approved August 5, 1870, the other buildings on the square were to be demolished. Fortunately, this act was never carried out; it was finally repealed in 1895.

Lithograph of Independence Hall in 1876. (Note Bailey’s statue of Washington opposite Chestnut Street entrance.) Courtesy Philadelphia Free Library.

With the 20th century, emphasis shifted from Independence Hall to the remainder of the group. Although some restoration work had been done in Congress Hall by the Colonial Dames of America in 1896, their efforts were confined to the Senate chamber and to one of the committee rooms on the upper floor. Additional restoration of Congress Hall was not undertaken until the American Institute of Architects became interested in the matter. In 1900, the Philadelphia Chapter of this organization made a study of the documentary evidence available on the building and began an active campaign for its restoration. Finally, in 1912, funds became available and the City authorized the beginning of work under the auspices of the Philadelphia Chapter. This was completed in the following year, and President Wilson formally rededicated the building. In 1934, additional work was done in the House of Representatives chamber.

Restored Assembly Room of Independence Hall, 1876. (Note President’s dais at far end of room, tile floor, and pillars—then thought to have supported the ceiling.) Courtesy Philadelphia Free Library.

The restoration of Congress Hall at Sixth Street brought into sharp contrast the condition of the Supreme Court building (Old City Hall) at Fifth Street. For many years the American Institute of Architects and other interested groups urged the City to complete restoration of the entire Independence Hall group by working on the Supreme Court building. This phase of the program, delayed by World War I, was not completed until 1922.

With the completion of restoration projects, the buildings on Independence Square presented a harmonious group of structures in substantially the appearance of their years of greatest glory. The neighborhood in which they were situated, however, had degenerated into a most unsightly area. Therefore, the improvement of the environs of Independence Hall, containing a large concentration of significant buildings, was the next logical development.

This movement to preserve the historic buildings in Old Philadelphia, and incidentally to provide a more appropriate setting for them, had long been considered. During World War II, the nationwide movement for the conservation of cultural resources became particularly active in Philadelphia, and much was done to coordinate the work of different groups. In 1942, a group of interested persons, including representatives of more than 50 civic and patriotic organizations, met in the Hall of the American Philosophical Society and organized the “Independence Hall Association.” This association was the spearhead of a vigorous campaign which resulted in stimulating official action to bring about the establishment of Independence National Historical Park Project.