The St. Alexander Nevsky Cathedral is located at the heart of Bulgaria’s capital city of Sofia. It was built in 1912. Designed in the Neo-Byzantine style, the church can hold 10,000 people and is one of the largest Eastern Orthodox cathedrals in the world. There are countless arches, wintergreen and gilded domes, ornate doors, stone carvings, murals, and mosaics. There is also a museum in the basement, within the cathedral crypt, that contains a major collection of Orthodox icons and masterpieces.