English: Saint Nicholas Greek Orthodox Cathedral located at 419 South Dithridge Street in the Oakland neighborhood of Pittsburgh, Pennsylvania, on September 17, 2011. The Cathedral was designed by architect Thomas Hannah, and built in 1904. Originally, it was the First Congregational Church until 1921, but it has been a Greek Orthodox Church since 1923. Currently, it is part of the Greek Orthodox Archdiocese of America, and more specifically the Greek Orthodox Metropolis of Pittsburgh. This Classical Revival style church building was added to the List of Pittsburgh History and Landmarks Foundation Historic Landmarks in 1982.