A community of Dominicans arrived in the mid-13th century and gradually extended the size of their priory, which was one of three Dominican priories in the county of Suffolk. A leper hospital was founded on the outskirts of the town in 1272. Sudbury was one of the first towns in which Edward III settled the Flemings, allowing the weaving and silk industries to prosper for centuries during the Late Middle Ages. As the main town in the area, Sudbury prospered too, and many great houses and churches were built, giving the town a major historical legacy. The Woolsack in the House of Lords was originally stuffed with wool from the Sudbury area, a sign of both the importance of the wool industry and of the wealth of the donors. One citizen of Sudbury, Archbishop Simon Sudbury showed that not even the Tower of London guarantees safety. On 14 June 1381 guards opened the Tower’s doors and allowed a party of rebellious peasants to enter. Sudbury, inventor of the poll tax, was dragged to Tower Hill and beheaded. His body was afterwards buried in Canterbury Cathedral, but his skull is kept in St. Gregory’s with St. Peter’s Church, one of the three medieval churches in Sudbury. Simon’s concerns for his native town are reflected in the founding of St Leonard’s Hospital in 1372, a place of respite, towards Long Melford, for lepers. For the College of St Gregory, which he founded in 1375 to support eight priests, he used his father’s former house and an adjoining plot.