The Priory or Hospital of St Thomas of Canterbury was a house of Augustinian canons in medieval Birmingham. The institution is referred to in sources as either a priory or a hospital, but the two roles were often overlapping or interchangeable during the medieval period, as all monastic institutions were supposed to care for the poor, sick and itinerant. The priory was situated north of Bull Street - then called Chapel Street after the priory's chapel of St Mary - in an extensive tract of its own land that extended as far as the Prior's rabbit warren or conygre, now marked by Congreve Street near Chamberlain Square. The date of the priory's foundation is unknown, but numerous later records suggest that it was established by a member of the de Birmingham family.