The Frick building, a Beaux-Arts mansion on the Upper East Side, was home to the magnate Henry Clay Frick (1849–1919). At 21, using a beehive oven, he discovered a way to turn coal into coke. By 30, he was a millionaire. Frick used his wealth to buy art—Bellini, Fragonard, Rembrandt, Titian, Turner, and Velázquez—and the Frick Collection, which opened to the public in 1935, has been a glowing jewel in Manhattan’s crown. An extensive renovation, however, closed the museum for the last five years. It is now reopening—a momentous occasion. Look for the new entrance, reception hall, and coat check, designed by the Cologne-born architect Annabelle Selldorf. —Elena Clavarino