Saint Dominic OP (Spanish: Santo Domingo; 8 August 1170 – 6 August 1221), also known as Dominic de Guzmán (Spanish: [ɡuθˈman]), was a Castilian Catholic priest, mystic, the founder of the Dominican Order and is the patron saint of astronomers and natural scientists. He is alternatively called Dominic of Osma, Dominic of Caleruega, and Domingo Félix de Guzmán.