Located at 1 North Broad Street, directly across from Philadelphia City Hall, it serves as the headquarters of the Grand Lodge of Pennsylvania, Free and Accepted Masons.

[2] The massive granite cornerstone, weighing ten tons, was leveled on St. John the Baptist's Day, June 24, 1868.

[8] The interior, designed by George Herzog, was begun in 1887 and took another fifteen years to finish.

[2] The bold and elaborate elevations on Broad and Filbert Streets, especially the beautiful portico of Quincy granite, make it one of the great architectural wonders of Philadelphia.

The exterior stone of the building on Broad and Filbert Streets is Cape Ann Syenite from Syne in Upper Egypt.