The Interrealm Museum is a place located in the Interrealms. It is directed by an old curator who oversees the museum's contents. It is featured in the Museum Melee DLC.
The Interrealm Museum also hosts an event where weapons are up for grabs by participants. All of the weapons are donated by people who do not have the need to fight anymore, and people fight to grab the weapons of others. The Curator says that there is often fighting and people fall unconscious and damage the museum. Fortunately, they are able to cover the costs. People from various dimensions come to participate, and thus it is a very popular event.