During the Spanish Conquest in the sixteenth Century, the Aztecs referred to the Spanish explorer and conquistador Pedro de Alvarado as Tonatiuh. Alvarado was said to be violent and aggressive and had a red beard, reminding them of their sun-god warrior (often painted red) Tonatiuh. In a translation of his writings, the Spanish conquistador Bernal Díaz del Castillo speaks of the Aztec's reference to Alvarado as "the Sun". Castillo describes Alvarado and Hernán Cortés meeting the Aztec ruler, Moctezuma II and being accompanied by his men, an encounter which includes a description of Alvarado's features:The ambassadors with whom they were travelling gave an account of their doings to Montezuma, and he ask them what sort of faces and general appearance had these two Teules who were coming to Mexico, and whether they were Captains, and it seems that they replied that Pedro de Alvarado was of very perfect grade both in face and person, that he looked like the Sun, and that he was a Captain, and in addition to this they brought with them a picture of him with his face very naturally portrayed and from that time forth they gave him the title of Tonatio, which means the Sun or the Child of the Sun, and so they called him ever after.