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 seats cross over into adjacent local-government districts. A total of 132,512 (2011 census) people live in the City of Norwich and the population of the Norwich Travel to Work Area (i.e., the self-contained labour market area in and around Norwich in which most people live and commute to work) is 282,000 (mid-2009 estimate). Norwich is the fourth most densely populated local-government district in the East of England, with 3,480 people per square kilometre (8,993 per square mile). In May 2012, Norwich was designated England's first UNESCO City of Literature. One of the UK's most popular tourist destinations, it was voted