Today, in the 1962 Dominican Rite Calendar, we commemorate the feast of Bl. Ambrose Sansedonius, confessor of the Order of Preachers. The ferial office of Lent is prayed, and the commemoration is made at Lauds only with the propers given in the Proper of the Saints.
From the Martyrology:
At Siena, in Tuscany, Blessed Ambrose (Sansedoni) of the Order of Friars Preachers. He was remarkable for his sanctity, preaching, and miracles. Clement VIII ordered his name to be inscribed in the Roman Martyrology.