There's a principle which states that, the nature of causality being what it is, there are infinite alternate universes in which every possible scenario has, will, and does happen. So it's really no surprise that there are infinite Hogwartses either. There's a Hogwarts where Harry is Albus Dumbledore's headmaster, and one where they learn the Dark Arts to fight against the good wizard Tom Riddle. You get the picture.

This is the Hogwarts where every fictional character that does not belong in Ms. Rowling's universe goes to learn magic.
That's right, every character. All you have to do is claim them.

They're right here, waiting.

HOGWARTS INFINITA.
MULTI-FANDOM HOGWARTS AU (NO HP CANONS, SORRY)
BRAND-NEW
HIGH POSITIONS OPEN
LITERATE & LAID-BACK
JOIN TODAY!