a Spanish painter of the Baroque period. Castello's style was very similar to the Carducci's, and therefore there have been challenges in identifying attributions. It seems likely he remained several years working as an officer in Carducci's workshop, because until 1633 there is no documentaion of his work as an independent painter. In 1627 he was called for the second time as Painter to the King position, left vacant now after Bartolomé González y Serrano's death.
