“Delacroix,” a retrospective of the 19th century French painter Eugène Delacroix, is a blockbuster show running this month at the Metropolitan Museum of Art. An ambitious Romantic, Delacroix is known for such paintings as “Women of Algiers” and is considered…

With opera attendance down some 34 percent over the last six years, New York's storied Metropolitan Opera is asking how it can help keep a cherished art form not only alive, but thriving.