The opulent salons and suites of Paris’s Hôtel de Crillon—which have hosted the signing of the Franco-American Treaty of Alliance as well as historic figureheads including Theodore Roosevelt, Jacqueline Kennedy, and Winston Churchill—will, for the first time, host a sale of its own prized furnishings. The hotel will close at the end of March for an extensive two-year renovation. Its historic silver, porcelain, furniture, lighting, tapestries, and fine wines and spirits, however, will be on view for five days b…