Alonso Sachez Coello (1531/32 -August 8, 1588) was a portrait painter of the Spanish Renaissance and one of the pioneers of the great tradition of Spanish portrait painting.
Alonso Sachez Coello was born in Benifairode les Valls, near Valencia, and spent his childhood there, until the death of his father when he was around ten years old. He was educated in Portugal at his grandfather's home. Coello's years in Portugal and his family name of Portuguese origin led to a long-standing belief that he was in fact Portuguese. His grandfather (after whom he was named) was in the service of King John III of Portugal who sent the young painter to study with Anthonis Mor (also known as Antonio Moro) in Flanders around 1550. He was under the service of Antoine de Granville, bishop of Arras, learning from Mor. While studying in Flanders, Coello also spent time copying some of Titian's works.