The Cathedral of Christ the Saviour near Moskva river, Moscow. Photo credit: Valeri Potapova/Shutterstock.com

On the northern bank of the Moskva River, in Moscow, there stands one of the tallest Orthodox Christian church in the world—the Cathedral of Christ the Saviour. Two churches had stood here, one after the other, for the greater part of the last 150 years. In the intervening period, there was an enormous swimming pool in this place, the largest in the Soviet Union.