It was build in Varna in 1912 on a suggestion by Tsar Ferdinand. The facade is of a peculiar design - bas-reliefs of a huge oyster and some of the most typical species of Black Sea fauna. The central hall of the Aquarium exhibits an impressive collection of fresh water and sea water representatives of the fauna presented in their natural habitat. Exhibitions in the adjacent halls give an idea of the flora and fauna and the specific features of the Black Sea.

One of the greatest values of the Varna Cathedral are the murals painted under the supervision of the Russian artist Prof. Rostovtsev. The Bishop’s throne and the iconostases are genuine masterpieces of the famous Debar school of woodcarving.