 There are roughly 50 research laboratories headed by senior researchers; they include Eric Betzig, Barry Dickson, Tamir Gonen, Lynn Riddiford, and Robert Tjian.The original Janelia Farm house is listed on the National Register of Historic Places, and the property was purchased by HHMI from the Dutch software maker Baan Companies in December 2000.The campus features a 900-foot (270 m) long, arc-shaped laboratory known as the Landscape Building.