Porticus Olidus

Porticus Olidus is a hall at Hogwarts Castle. It's unknown to why it has its name.

Behind the scenes

 * This hall can only be seen on the official Marauder's Map replica made by the Noble Collection.
 * A "Porticus" is an entrance-porch of a church. "Olidus" means, in Latin, "evil-smelling", "fetid".