The gold-domed Alexander Nevsky Cathedral was built in the early 20th century in memory of the 200,000 Russian, Ukrainian, Belorussian and Bulgarian soldiers, who died in the Russo-Turkish War, 1877–1878. It is one of the largest Eastern Orthodox cathedrals in the world. The cathedral’s gold-plated dome is 45 m high, with the bell tower reaching 50.52 m.
The St. Alexander Nevsky Cathedral (Bulgarian: Храм-паметник „Свети Александър Невски“, Hram-pametnik „Sveti Aleksandar Nevski“) is a Bulgarian Orthodox cathedral in Sofia, the capital of Bulgaria. Built in Neo-Byzantine style, it serves as the cathedral church of the Patriarch of Bulgaria and is one of the largest Eastern Orthodox cathedrals in the world, as well as one of Sofia’s symbols and primary tourist attractions.The St. Alexander Nevsky Cathedral in Sofia occupies an area of 3,170 square metres (34,100 sq ft) and can hold 10,000 people inside. It is the second biggest cathedral located on the Balkan Peninsula after the Cathedral of Saint Sava in Belgrade.