Memorial of Saint Dominic de Guzmán, priest (†1221 Bologna – Italy). Son of Blessed Joan of Aza, of a noble Castilian family. He was born in Spain in 1170 and died in Bologna, Italy, in 1221. Founder of the Order of Friars Preachers, or Dominicans. He fought the Albigensian, Cathar, and Waldensian heresies. He was the great apostle of the Rosary. The Virgin Mary entrusted this devotion to him.