Okay kiddo, St. Catherine's Cathedral is a big, pretty building in the city of Kherson. It is a special place where people go to learn about God and worship Him.
It was built a long time ago, in the 1780s, when people in Kherson wanted to have a nice place to pray and sing songs. They decided to build a big, fancy cathedral with tall walls and a dome on top that shines in the sun.
Inside the cathedral, you will see beautiful paintings and carvings. You can also hear music played on big organs and choirs singing. All of this is very special and important to the people who go there to worship God.
Even today, St. Catherine's Cathedral is still an important part of Kherson's history and culture. People from all over the world can visit it and learn about the history and beliefs of the city's people.