The Cathedral of Christ the Savior is a Russian Orthodox cathedral in Moscow, Russia, on the northern bank of the Moskva River, a few hundred meters southwest of the Kremlin. With an overall height of 103 metres (338 ft), it is the tallest Orthodox Christian church in the world.

The original church was the scene of the 1882 world premiere of the 1812 Overture composed by Tchaikovsky, which became internationally famous.