In today’s History newsletter: Ten remarkable WWII museums around the world, what we actually know about Cleopatra, and the origins of the Renaissance Fair.  

But first:  The missing heiress at the center of New York’s oldest cold case.

Dorothy Arnold’s disappearance has enthralled people ever since she vanished on December 12, 1910. On that icy Monday morning, the 25-year-old socialite left her Upper East Side mansion to go dress shopping for her little sister Marjorie’s upcoming debutante ball. She told a friend she was shopping with her mother, and told her mother she’d rather shop alone. Read or listen to her story.

Thanks for reading today’s newsletter, edited and curated by William O'Connor and produced by Amanda Petty. Sign up here to get our future adventures in your inbox.