Vienna's Theatre Museum is located in the splendid Lobkowitz Palace, the first important palace built in Vienna after the second Ottoman siege in 1683. The museum evolved from the Theater Collection of the Austrian National Library, founded in 1922. It opened here in the palace in 1991, and today represents one of the largest and most important collections in the field of theatre with the possibility for presentations in magnificent show rooms. Since November 2017 it has hosted the collection of Old Masters usually on display in the Academy of Fine Arts (currently being renovated).