Among the other early foundations in Fitzstephen's time were the hospital and church of St. Katharine, by the Tower, built by Matilda, queen of Stephen; St. Mary Overy's Priory, at the Southwark foot of London Bridge, founded in 1106; and the great Priory of the Holy Trinity, without Aldgate, whose prior was an Alderman of London. Among the lesser foundations were the hospitals of St. Giles and St. Mary Spital, the nunnery of Clerkenwell, and that of St. Helen, Bishopsgate. The hospital of St. Thomas of Acon was founded by Agnes, sister of St. Thomas of Canterbury, about twenty years after his martyrdom, the site being that of the house occupied by the Becket family in Cheapside. At the Dissolution the whole was granted to the Mercers, who established on the site their hall and chapel. Besides the injury done to the parishes by the monastic system, and the consequent impoverishment of the parochial clergy, another grave evil attaching to these religious foundations was their exemption from episcopal control. This was especially the case with all the Cistercian houses. The Carthusians, an order of monks founded by St. Bruno in the later part of the eleventh century, had a famous London house, still known as the Charterhouse, established in 1349 by Sir Walter de Manny. These various Orders had standing rivalry among themselves. The Regulars, who retired from the world in complete monastic seclusion, were bitterly jealous of the Seculars, who associated themselves with the Cathedral and parochial clergy and mixed with the people. Much misapprehension prevails on the subject of these religious Orders. There was no "poverty" in Monasticism, whatever the vows. The hospitality for which their friends praised them so much was often a condition of their foundation charters, under which they were obliged to entertain their founders when they travelled that way. A striking instance is seen in the case of Bethlehem Hospital, which was founded solely for the purpose of "entertaining the Bishop of Bethlehem if ever he should visit England"--a transparent ruse for maintaining in luxury a master who did not even wear a habit.