Hôtel de Spangen, Neoclassical mansion in Brussels, Belgium

The Hôtel de Spangen is a Neoclassical building at Place Royale 13–14, on the corner with Rue Montagne de la Cour. Its two street facades are painted white, with rusticated stonework on the lower levels and smoother walls above, and rows of tall windows topped by projecting cornices. A balustrade runs along the flat roofline. Since 2000 it has housed part of the Musical Instruments Museum.

The Hôtel de Spangen was built in 1776–1777 for Count Corneille Juste Philibert Philippe de Spangen on land he bought in January 1776 for 38,000 florins, part of the Place Royale scheme designed by Jean-Benoît-Vincent Barré and Barnabé Guimard after the 1731 fire destroyed the Coudenberg Palace. In 1913 Old England gutted the interior, leaving only the exterior facades; the Belgian State bought the building in 1979.

Since 2000 the building has housed the Musical Instruments Museum (MIM), which opened to the public that year after the Belgian State bought the property in 1979. The 1913 works for Old England destroyed the interior and its decorations, so only the exterior facades of the original central block survive. The museum's entrance is reached through the neighbouring Old England building of 1898-99 by Paul Saintenoy.

The building stands at Place Royale 13-14, on the corner where Rue Montagne de la Cour descends toward the Mont des Arts. The museum wing is entered from the Place Royale side; the neighbouring Hôtel de Grimbergen at no. 10 houses the BIP tourist information centre. The Old England Art Nouveau building by Paul Saintenoy adjoins the mansion.

The building's name comes from Count Corneille Juste Philibert Philippe de Spangen, who bought the old Cour d'Hoogstraeten on 3 January 1776 for 38,000 florins and had it partly demolished to build his mansion in 1776-1777. He was chamberlain at the Vienna court, and his heirs, the van der Linden d'Hooghvorst family, sold to the Prince of Orange, who lived here from January 1821.