Marcia Hafif at Fergus McCaffrey, through June 25 (514 West 26th Street)
The gallery’s two-floor show revisits a striking body of work that this under-appreciated Pop Minimalist made during her ex-pat period in Italy, from 1961 to 1969. The nearly 50 deceptively simple paintings mark the octogenarian artist’s most significant US show in 25 years.