Hyacinth of Poland was a 13th-century Dominican priest and missionary from the noble Odrowąż family. Born in Silesia around 1185, he pursued advanced studies in Paris and Bologna, eventually earning doctorates in both divinity and law. After joining the Dominican Order in 1220, he became a key figure in establishing the order within Poland. He spent much of his life traveling as a preacher and missionary throughout Northern Europe, focusing on spreading his faith and reforming various women's monasteries.