An astonishingly beautiful Russian Orthodox cathedral. Services daily at 10 am and 6 pm. The church is open daily 8 am-8 pm. Free (contributions encouraged). Preobrazhenskaya Ploshchad 1 (just off Liteiny Prospekt, about a 20-minute walk from Nevsky Prospekt, metro station Chernyshevskaya), St. Petersburg. Phone 812-272-3662.