Feast Day - August 17
Hyacinth was a Pole, born of noble Christian parents at the villa of Kamin in the bishopric of Breslau. He was enrolled among the canons of Cracow and excelled them all in his singularly devout way of life and in his learning. At Rome, he was received into the Order of Preachers by its founder, St. Dominic; and to the end of his days, his virginity intact, he held to the perfect rule of life which he had learned from St. Dominic. He was sent back to his own country and built six monasteries of his Order.
It is unbelievable how much he accomplished by preaching the word of God and by the innocence of his life, made illustrious by numerous miracles. Among these is the particularly remarkable miracle: he crossed over the river Vistula near Visograd when it was in flood, taking his companions with him, not by boat but on his cloak spread out over the waters. He persevered in his wonderful way of life for nearly forty years after his profession. On the day of the Virgin’s Assumption in the year of salvation 1257, he gave up his soul to God. He was numbered among the Saints by Clement VIII.
Taken from The Hours of the Divine Office in English and Latin, Vol. III: August to Advent (Collegeville, Minnesota: Liturgical Press, 1963), p. 1454.