Saint Isaac's Cathedral

Saint Isaac's Cathedral Исаакиевский Cобор Isaakievskiy Sobor
Religion
Affiliation	State Russian Museum Russian Orthodox
Status	Museum, with church services in side chapel
Location
Location	Saint Isaac's Square 4, Saint Petersburg, Russia
Architecture
Architect(s)	Auguste de Montferrand
Style	Late Neoclassical, Byzantine and Greek (cross church)
Completed	1858
Specifications
Capacity	12,000[1][2] 260,000 m3 (volume)[3]
Length	104.5 m (interior)[3] 111.3 m (stairs)[3]
Width	91 m (interior)[3] 97.6 m (stairs)[3]
Interior area	7,000 m2 (interior)[2][4] 8,000 m2 (stairs)
Height (max)	101.52 m (top cross)[1][5] 31.5 m (nave interior)[3] 80 m (dome ceiling)[6]
Dome dia. (outer)	25.8 m[7]
Website
Cathedral.ru

Saint Isaac's Cathedral or Isaakievskiy Sobor (Russian: Исаа́киевский Собо́р, romanized: Isaákiyevskiy Sobór) is a large architectural landmark cathedral that currently functions as a museum with occasional church services in Saint Petersburg, Russia. It is dedicated to Saint Isaac of Dalmatia, a patron saint of Peter the Great, who had been born on the feast day of that saint. It was originally built as a cathedral but was turned into a museum by the Soviet government in 1931 and has remained a museum ever since, with church services held in a side chapel since the 1990s. In 2017, the Governor of Saint Petersburg offered to transfer the cathedral back to the Russian Orthodox Church, but this was not accomplished due to the protests of St Petersburg citizens opposing the offer.