There’s a silly Monty Python sketch from a half-century ago that some of you surely remember, and it spawned an enduring meme — though we didn’t have that name for it then. In the scene, a hapless ...

“Nobody,” the Monty Python skit goes, “expects the Spanish Inquisition,” and the same goes for visitors to the Prado Museum in Madrid. Turning a corner on the second floor, viewers come face-to-face ...