The Catholic Church has been around for a really long time, like grandpa or grandma! It formed way back in the time of Jesus Christ and has gone through many changes throughout history, just like how you grow and change as you get older.
One important thing to know is that the Catholic Church had a lot of power in Europe during the Middle Ages. It was kind of like the principal of all the kingdoms and countries in Europe! They had a lot of rules that people had to follow, and they were in charge of things like education and even some aspects of government.
But sometimes, the Catholic Church made mistakes or did things that weren't very nice to people. For example, they didn't always treat people who were different from them with respect, and they didn't allow women to become priests. Over time, people began to question the Church's authority and some people even started their own churches that didn't follow all the rules of the Catholic Church.
In the 16th century, there was a really big split in the Church called the Protestant Reformation. This is when some people decided that they wanted to create their own churches that didn't follow all the rules of the Catholic Church. The Church didn't like this very much and sometimes they punished people who didn't follow their rules.
But over time, things began to change. In the 20th century, the Catholic Church began to adapt to modern times and became more open to new ideas and different kinds of people. They also started to apologize for some of the things they did wrong in the past.
Today, the Catholic Church is still a very important part of many people's lives, but it has learned from its mistakes and continues to change and adapt as the world changes around it.