Okay, so imagine you and your friends are playing knights and princesses. You have a special group of knights that you call the "Templar Knights". They wear special uniforms and follow a set of rules that make them really special.
In Italy a long time ago, there was a group of knights called "Templari Cattolici d'Italia". They were kind of like your group of Templar Knights. They had special rules too, but they weren't just playing a game. They were a real group of knights who followed the Catholic religion.
The Templari Cattolici d'Italia were very important because they protected important buildings and people, kind of like bodyguards. They were also very good at fighting in battles. But they weren't just tough guys, they also helped poor people and did good things.
Unfortunately, a long time ago the Templari Cattolici d'Italia were accused of doing bad things. Some people thought they were secretly plotting against the people in charge. The people in charge were afraid of the Templari Cattolici d'Italia and decided to get rid of them. They took away their special uniforms and stopped them from being knights.
So even though they were once very important, the Templari Cattolici d'Italia don't exist anymore. But we can still remember them and think about how brave and important they were in their time.