The Oldmasters Museum (French: Musée Oldmasters) is a museum in Brussels, Belgium, dedicated to European painters from the 15th to the 18th centuries. It is one of the constituent museums of the Royal Museums of Fine Arts of Belgium. The museum was founded in 1801 by Napoleon Bonaparte. It was originally named the Musée royal d'art ancien (Royal Museum of Ancient Art).
The museum's collection includes works by several Early Netherlandish painters, including Hieronymus Bosch, Dirk Bouts, Petrus Christus, Lucas Cranach, Gerard David, Hans Memling, and Rogier van der Weyden. Other painters represented in the collection include Pieter Bruegel the Elder, Philippe de Champaigne, Anthony van Dyck, Jacques Jordaens, Jusepe de Ribera, Peter Paul Rubens, Giovanni Battista Tiepolo, and Simon Vouet.
- "Musée Oldmasters Museum". Royal Museums of Fine Arts of Belgium. Retrieved 26 May 2016.