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 feeder to KLM's Schiphol hub. FlyBe, Eastern Airways all serve Norwich. Through Bristow Helicopters Norwich airport serves the offshore oil and gas industry. There is a strong holiday charter flight business. The airport was originally the airfield of RAF Horsham St Faith. One of the old RAF hangars was once the home of Air UK, which grew out of Air Anglia and was then absorbed by the Dutch airline KLM. National Cycle Route 1 passes through Norwich, linking Beccles and Fakenham (and eventually Dover and the Shetland Islands). The River Yare is navigable from the sea at Great Yarmouth up