Sol LeWitt: A Wall Drawing Retrospective was a product of collaborative efforts between the artist himself and the Yale University Art Gallery. After his death in 2007, the project was moved to Mass MoCA in the Berkshires, where the installation will be going on until 2033. With plenty of time to check it out in person, this inventive and fun site alternatively allows visitors to view the current drawings by grid or by museum layout. The show is rotating all the time, so return visits are encouraged. In the About area, visitors can learn more about this long-running show and the legacy of LeWitt. Visitors can also view time-lapse videos of the installations that have taken place since the show opened in 2008.