Original: August 6, 1221) was the founder of the Friars Preachers, popularly called the Dominicans or Order of Preachers (OP), a Catholic religious order.
Simplified: August 6, 1221) was the founder of a Catholic religious order, the Friars Preachers, often called the Dominicans or the Order of Preachers (OP). He is sometimes called Dominic of Osma or Dominic de Guzmán.