To celebrate its 50th anniversary, LACMA presents a collection of 19th- and 20th-century masterpieces gifted to the museum by more than 25 donors including Los Angeles philanthropist A. Jerrold Perenchio. Among the highlights are “Two Marilyns” by Andy Warhol and “At the Café-Concert: The Song of the Dog” by Edgar Degas. (323-857-6000; lacma.org)