Attributed to Juan Bautista Martínez del Mazo

This heading gathers pictures that scholars connect with Juan Bautista Martínez del Mazo without being sure of it. With Mazo that doubt comes with the career. He was the son-in-law and chief assistant of Velázquez at the court of Philip IV in Madrid, and much of his work was copying his father-in-law's portraits so closely that the two hands are still argued over. When a picture in the manner of Velázquez turns out not to be by Velázquez, Mazo is often the first name proposed.

One such picture is the full-length portrait of Don Adrián Pulido Pareja in the National Gallery in London, just over two metres tall. The sitter was a captain in the Spanish royal navy. The picture was bought in 1890 as a Velázquez, with his name and a date painted on the canvas, and the inscription has since been shown not to be original. The Gallery now catalogues it as possibly by Mazo, perhaps copying a lost original by Velázquez. It hangs in Room 19.