Gringotts

Gringotts is a bank, protected by goblins. And no one would dare to steal something from there.

Gringotts' Headquarter is in Diagon Alley and stands out strongly against the small shops: "They had reached a snowy-white building which towered over the other little shops." Besides the burnished bronze doors, there are also a pair of silver doors, a marble hall, and lots more.