But the first actual drawings we’re shown are small and very careful pencil self-portraits from the mid-Fifties, when Hockney was still a student in Bradford. He stares back at us through NHS ...

Giovanni Francesco Caroto painted the Portrait of a Young Boy Holding a Child's Drawing. The boy's eager, slightly toothsome smile gives this picture a place in the history of portraiture.

Kelvin Okafor is using his latest exhibition, “Drawing Awareness,” to call attention to different skin conditions, with portraits of people including model Winnie Harlow and singer Seal.