Sol Lewitt
I like this Sol Lewitt mural in the lobby of 100 Cambridge St. in Boston (near City Hall Plaza).

There are a few other places in the northeast where Sol Lewitt’s murals can be seen (besides, of course, the warehouse full of his works at MASS MoCA). Here’s a mural at the Wadsworth Athenaeum (in Lewitt’s hometown of Hartford, CT):

And here’s one in New York City (at the 59th Street-Columbus Circle subway station):
