St. Isaac's Cathedral is one of the biggest Orthodox churches in Saint Petersburg. The Cathedral was named in honour of St. Isaac of Dalmatia, who was respected by Peter the Great as he was born on St. Isaac's day. The church was built during the period of 1818-1858 by the famous French architect Auguste de Montferrand. The construction was inspected by the emperor Nicholas I himself. The Cathedral was opened on May 30, 1858, and it was consecrated as a cathedral.

After the revolution of 1917 the Cathedral was closed and there had been no services since 1928. Later the museum of atheism was created inside of the Cathedral. During WWII it suffered from German bombs, nowadays one can still find the tracks of bombs on the walls and steps of the church. The services were revived in 1990 and take place regularly on big religious holidays and Sundays. The Cathedral is a part of the State Museum "St. Isaac's Cathedral".

Opening hours:
In winter - daily from 11:00 till 19:00, closed on Wednesday. The ticket office closes at 18:00.
In summer - daily from 10:00 till 20:00, closed on Wednesday.
Timetable is subject to change without prior notice.