Children’s sketches of violent scenes of gladiators and hunters battling animals have been uncovered at the archaeological park of Pompeii, the park’s superintendent has said.

Since its discovery nearly 50 years ago, a room beneath the Medici Chapels in Florence covered in sketches has been closed to the public. Next month, that will change.

A collection of drawings by Leonardo da Vinci makes its U.S. debut in Washington, D.C. — not at a museum, but at a public library. The Martin Luther King, Jr. Memorial Library hosts the exhibition.

Prehistoric humans in Brazil carved drawings in the rock next to dinosaur footprints, suggesting they may have found them meaningful or interesting, a study found.

Worlds on Paper: Drawings from Kinngait continues at the McMichael Canadian Art Collection to Aug. 24. Editor’s note: A previous version of this article incorrectly credited a 1963 muskox print ...