The Dia Foundation is closing its much-loved Chelsea warehouse gallery for two years of rennovations. “The converted warehouse at 548 West 22nd Street was one of the first art venues in the Chelsea district when it opened in 1987, and with some 60,000 visitors annually, it needs new passenger and freight elevators, climate control, roof repairs, and more lavatories. Trustees have pledged $10 million towards a $50-million campaign that seeks $30 million for the Chelsea space and $20 million for Dia’s acclaimed new museum in Beacon, New York as well as for other long-term projects, including land art by Michael Heizer and James Turrell.”