30 January 1640, Viterbo
1807 by Pope Pius VII
A religious of the Third Order of St. Francis and foundress of the Sacconi; born 1585 of a noble family at Vignanello, near Viterbo in Italy; died 30 January, 1640, at Viterbo; feast, 30 January; in Rome, 6 February (Diarium Romanum). Her parents were Marc' Antonio Mariscotti (Marius Scotus) and Ottavia Orsini. At Baptism she received the name Clarice and in early youth was remarkable for piety, but, as she grew older, she became frivolous, and showed a worldly disposition, which not even the almost miraculous saving of her life at the age of seventeen could change; neither was her frivolity checked by her education at the Convent of St. Bernardine at Viterbo, where an older sister had taken the veil. At the age of twenty she set her heart upon marriage with the Marquess Cassizucchi, but was passed by in favour of a younger sister. She was sadly disappointed, became morose, and at last joined the community at St. Bernardine, receiving the name Hyacintha. But, as she told her father, she did this only to hide her chagrin and not to give up the luxuries of the world; and she asked him to furnish her apartments with every comfort. She kept her own kitchen, wore a habit of the finest material, received and paid visits at pleasure.
(Taken from Catholic Encyclopedia)