The Old Drostdy Museum is a collection of many historical buildings in Swellendam, South Africa. The Drostdy was originally built by the Dutch East India Company in 1747 to serve as residence and official headquarters for the Landdrost. In 1846 the government sold the Drostdy and the property was subdivided. Later in 1855 the Steyn family bought the property, and it remained in their family until 1939 when it was bought back by the government of the Union of South Africa for the purpose of establishing a museum.