Isaakievskaya ploshchad 1, St Petersburg, Russia
Opening Times: Cathedral: Thurs-Tues 1100-1900 (Oct-April); Thurs-Tues 1100-2230 (May-Sept). Colonnade: Thurs-Tues 1100-1800 (Oct-April), Thurs-Tues 1000-1800 (May-Sept).
Admission Fees: Yes
Disabled Access: No
Unesco: Yes