http://www.kcmuseum100.org/househistory.html K.C. Museum]- Accessed 2012-05-10 Friends of KC museum- Accessed 2012-05-10 It took 18 months to complete, using Belgian craftsmen and Sicilian stonemasons, among 2,000 other workers employed, to build the Longview Mansion and 50 other farm structures on 1780 acres .