Huygens' Swaensteyn is the house of history, art and culture in Voorburg and Leidschendam. The museum is established in the Notary house in the Herenstraat, one of the oldest buildings in the historical centre of Voorburg. The Museum presents at least four temporary exhibitions a year. The Romans, Forum Hadriani and the extraordinary life of Princess Marianne of the Netherlands are also a part of the main Collection.