Okay kiddo, today we're going to talk about something called the Stoglavy Sobor.
Now, a long time ago, in Russia, there were some very important people called the Orthodox Church leaders. They were kind of like the bosses of the church. But sometimes, they would have different ideas about how things should be done in the church. It was like when you and your friend can't agree on what game to play.
So, they decided to have a big meeting, called a Sobor, to talk about these ideas and try to come up with some rules that everyone could agree on. This particular Sobor was called the Stoglavy Sobor, which means "Council of a Hundred Chapters" in Russian.
Now, at this Sobor, they talked about a lot of different things. They talked about how to worship, how to perform sacraments like baptism and marriage, and how to choose leaders for the church. They also talked about things like how to take care of the poor and how to make sure everyone was following the same rules.
In the end, they wrote down all of their ideas and made a big book called the Stoglavy Sobor. This book became a very important guide for the Orthodox Church in Russia, helping everyone to follow the same rules and ideas.
So, that's what the Stoglavy Sobor was all about. It was a big meeting where church leaders talked about important things and made some important rules to follow.