Battle before St Quentin, 1557. From the fresco by Granello and Castello Hall of Battles, the Escorial, Madrid.

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: Battle before St Quentin, 1557. From the fresco by Granello and Castello Hall of Battles, the Escorial, Madrid. Wellcome Collection. Source: Wellcome Collection.