Thousands of important historical documents are preserved inside Hôtel de Soubise and Hôtel de Rohan—a pair of spectacular buildings built in 1705 as private homes. Fans of the decorative arts will appreciate a visit to the former, where the well-preserved private apartments of the Prince and Princess de Soubise are among the first examples of the rococo style, which preceded the more somber Baroque opulence of Louis XIV. Hôtel de Soubise also has a museum that displays documents dating from 625 to the 20th century. Highlights include the Edict of Nantes (1598), the Treaty of Westphalia (1648), the wills of Louis XIV and Napoléon, and the Declaration of Human Rights (1789). Louis XVI's diary is also here, containing his sadly clueless entry for July 14, 1789—the day the Bastille was stormed and the French Revolution was launched. The Hôtel de Rohan, open to the public only during Patrimony weekend in September, was built for Soubise's son, Cardinal Rohan. Before you leave, notice the medieval turrets in the courtyard: this is the Porte de Clisson, all that remains of a stately 14th-century mansion.