"Sirius is locked in Professor Flitwick's office on the seventh floor."
--Albus Dumbledore (PA21)
The seventh floor corridor of Hogwarts includes the Gryffindor Common Room, the Room of Requirement, and many portraits.
The seventh floor corridor is the home of many notable portraits at Hogwarts. See the Hogwarts Denizens page to find out more about the portraits in the seventh floor corridor, as well as the others around Hogwarts.