The Musée Nissim de Camondo is more of a portal into the past than it is your run-of-the-mill museum. It is housed in the Hôtel Camondo, not a hotel but a home built in 1911 in the style of the Petit Trianon at Versailles on the strict instructions of its owner, Comte Moïse de Camondo. Comte Camondo was a Parisian banker with a penchant for 18th-century art and furniture, and his home was a kind of showcase for his extensive collection. Today the Musée Nissim de Camondo is kept just as it was when he lived there, and it's a fascinating tour of life in the early 1900s as well as French design in the 1700s.
The Musée Nissim de Camondo is at 63, rue de Monceau in the eighth arrondissement. Simply take the M2 to Monceau, and you're there!
Photo courtesy of Les Arts Décoratifs