The building at 421 E. 6th Street looks unassuming enough. It’s still got the facade of the Con Ed substation that it was in the 1920s, and chances are, if you’re strolling by on the way to Tompkins Square Park, you probably wouldn’t stop and stare.

But inside, the gigantic space is filled with the minimalist installations of Walter De Maria, who purchased the lot in 1980 and turned it into his studio and home that he occupied and built upon until his death last year. He transformed the building into a work of art itself, perhaps the encapsulation of his entire career and life.