Catwoman's Penthouse is an unnamed penthouse Selina Kyle resided within between the Zero Hour incident and the Cataclysm earthquake. Located at the top of a multi-story building, it is unknown if the building and the penthouse survived the earthquake.
The penthouse originally belonged to Guido Bertinelli when he was ruler of the Gotham mafia families. Rumor had it that it was one of many locations he used for people or merchandise too "hot" to stash at home.
Upon her arrival, Selina converted the apartment's saferoom into her den where she kept her gadgets, costumes and various propaganda that are too "hot" to display in the penthouse.