The classical style of this church, which is now the cathedral for the Metropolis of Pittsburgh, is quite unusual for a Greek Orthodox church. Greek Christians do not usually build in a Greek classical style—and the style of this church, with the prominent arch in the front, is more Roman than Greek. The explanation is that it was built for Methodists; the Orthodox congregation bought it from them.
Even if you don’t know much Greek, you can probably guess that this is the name of the church in Greek: “St. Nicholas Greek Orthodox Cathedral Church.”
One of the splendid Ionic capitals that hold up a front of which Vitruvius would have approved.