Saint Nicholas Greek Orthodox Cathedral located at 419 South Dithridge Street in the Oakland neighborhood of Pittsburgh, Pennsylvania, was designed by architect Thomas Hannah and built in 1904.

[3] Architecturally, the cathedral is described by Walter C. Kidney in his book Landmark Architecture: Pittsburgh and Allegheny County (1985) as: A Grecian Ionic portico, executed in sandstone, is the grand and appropriate introduction to a church that has belonged to the Greek Orthodox Church since 1923.

The exterior, with its big round-arched windows, is not otherwise specifically symbolic, but the interior is rich with paintings and mosaics.

Notable inside are the painting in the dome of Christ the Pantocrator (Ruler of All), with its background of gold leaf, and the iconostasis of metal and mosaic, with peacocks finely depicted on the Royal Doors.

"[2]Franklin Toker describes the structure in his book Pittsburgh: A New Portrait (2009) as follows: "Originally the First Congregational Church, until 1921, this is an unusually vigorous design in yellow industrial brick preceded by a dramatic Ionic portico.