Musée Carnavalet explores the history of Paris via this art museum located inside two Marais district mansions. Parisian history starts in prehistoric times (around 4600 B.C.) at this city-run museum and continues to the present day. Centuries of Paris history evolve inside the grand rooms and lush gardens of what was once l’hôtel de Carnavalet (built in 1548) and l’hôtel Le Peletier de Saint-Fargeau (built in 1688). The museum holds around 600,000 objects d’art in more than 100 rooms. The interior architecture reflects five centuries of ornate royal décor, but Second Empire decoration is most prominent.