Some vandals once broke into a church building and set it on fire. It just so happened that a group of men in the congregation were scheduled to gather at the church to pray early that morning. When they got there they smelled smoke and called the fire department. The firefighters arrived in time to extinguish the flames and save the building. Had those men not come to church to pray, the building would have been destroyed.
I suppose that prayer can save a church in other ways too.
“Pray continually.”—1 Thessalonians 5:17.