With Putin talking about the orthodox church being holy and using to justify some conservative bullshit, all I can remember was the bolsheviks going around the country proudly declaring that cities were now "officially godless" and redistributing the church's gold amongst the people and using it to pay for electrification projects.
Others have already gave some good answers, but I'll say that the Soviets (for most of their history) desired for there to be ideally only one church in each town (plus a synagogue or mosque if there was a significant population of Jews or Muslims, though that didn't always happen.) If it was a bigger city there could be a few more but religion was definitely kept controlled. Obviously it'd be a pain in the ass to get to the one church and the KGB monitored most of them since dissidents often were there. If you went to church you wouldn't advertise it but it wouldn't be considered criminal.
Smart move lol. But yeah that's deff religious "control"