When the Harry Potter series introduced Hogwarts, the Scottish castle where students learn how to practice magic, fans immediately began sorting themselves into one of its four houses: Slytherin, Ravenclaw, Hufflepuff, and Gryffindor. As most of the characters belonged to the latter, Gryffindor House became one of the most popular ones in the fandom.
Source：https://www.cbr.com/harry-potter-strongest-gryffindors-ranked/
