"David Hockney Portraits"—featuring some 150 paintings ... who specializes in the rich and mighty: Hans Holbein the Younger, say, or Frans Hals, Sir Anthony Van Dyck or John Singer Sargent.

The Northern Renaissance took place in Europe north of the Alps, primarily in regions like the Netherlands, Germany, France, and England. The Manhattan museum’s Gilded Age mansion reopens next month, ...