Complex sentence: The museum is housed within the Hôtel de Salm, built in 1782 by architect Pierre Rousseau for Frederick III, Prince of Salm-Kyrburg, burned in 1871 during the Paris Commune, and subsequently restored by subscription of medallists.
Split into simpler sentences: The museum is housed within the Hôtel de Salm, built in 1782 by architect Pierre Rousseau for Frederick III, Prince of Salm-Kyrburg. The building burned in 1871 during the Paris Commune, and it subsequently was restored by a subscription of medallists.