This drawing dates from around 1510, although Leonardo had first started looking at human skulls in 1499, when he got access to human cadavers from the hospital of Santa Maria Novella in Florence.

Sketch of King Richard II's skull found among medieval tomb relics in museum basement . By DAILY MAIL REPORTER Updated: 05:15 EDT, 17 November 2010 ...

This drawing dates from around 1510, although Leonardo had first started looking at human skulls in 1499, when he got access to human cadavers from the hospital of Santa Maria Novella in Florence.