Naper Settlement, established in 1969, is a 12-acre (49,000 m2) outdoor history museum accredited by the American Alliance of Museums that consists of a collection of thirty historical buildings and structures from the Naperville, Illinois area. Many buildings were moved here from their original locations and refurbished in a style fitting of their time periods that range from 1831, when Naperville was founded, through the early 20th century. Visitors can come for hands-on activities and tours led by museum educators in period costumes. The Settlement is situated on land bequeathed to the City of Naperville in 1936 by Caroline Martin Mitchell.