Norwich also records the site of an Anglo-Saxon church in Tombland, the site of the Saxon market place and the later Norman cathedral. Norwich continued to be a major centre for trade, the River Wensum being a convenient export route to the River Yare and Great Yarmouth, which served as the port for Norwich. Quern stones and other artefacts from Scandinavia and the Rhineland have been found during excavations in Norwich city centre. These date from the 11th century onwards. Norwich Castle was founded soon after the Norman Conquest. The Domesday Book records that 98 Saxon homes were demolished to make
Norwich Castle landed in England in May 1174, and 500 of his own men, Bigod advanced on Norwich Castle. They captured it and took fourteen prisoners who were held for ransom. When peace was restored later that year, Norwich was returned to royal control. The Normans introduced the Jews to Norwich and they lived close to the castle. A cult was founded in Norwich in the wake of the murder of a young boy, William of Norwich, for which the Jews of the town were blamed. In Lent 1190, violence against Jews erupted in East Anglia and on 6 February (Shrove Tuesday)