Christie's May 12-15 auctions present a high-stakes referendum on market resilience amid economic crosscurrents. Represented: everone from Basquiat to Van Gogh.

Ed Ruscha / Now Then, a monumental, career-spanning retrospective at the Museum of Modern Art, pays due appreciation to Ruscha’s early fascination with Route 66’s fuel franchises before accelerating to trace the 85-year-old pop art pioneer’s six-decade career.