The Cathedral of St. George Historic District encompasses a historic church complex at 517-523-525 East Broadway in South Boston, Massachusetts. The church building was designed by Boston architect Samuel J. F. Thayer and was built in 1872 to house a Unitarian congregation. The polychrome Gothic Revival structure was acquired in 1949 by the Albanian Orthodox Archdiocese of the Orthodox Church in America.[2] The complex also includes two brick houses, 517 and 525 East Broadway, which were built about the same time as the church, and were owned by the Unitarian congregation.[3]