Runcorn is an industrial town in the unitary authority of Halton in England and is located on the south side of the River Mersey about 20 kilometers east of Liverpool. It has 61,330 inhabitants (as of 2001). The town's name derives from the Saxon times; The settlement was called Rumcofan. The ruler of the Kingdom of Mercia, Aethelflead (872-918), built in Runcorn a fortress to protect the northern border of the kingdom against the Vikings. The first mention Runcorns refers to the visit Aethelfleads in 915. Nevertheless Runcorn is not listed by 1086, although the neighboring towns Halton, Weston, Aston, Sutton and Stockham mentioned in the Domesday Book. Either counted Runcorn time to Halton or it was considered too insignificant to be included in the Domesday Book. At the time of Norman Hugh d'Avranches, Earl of Chester, his territory in baronies said. The Barony Halton was given dominion over the other baronies. The first Baron of Runcorn, Nigel, built in 1071 on the Halton Hill moth (motte). Halton Castle now in ruins is still preserved. 1115 founded the son of Baron Nigel, William Fitznigel, an Augustinian priory in Runcorn. This was laid in 1134 by Norton, about 6 km from Runcorn. The barons of Halton supported the priory to 1200 financially. 1391 she was elevated to abbey. 1536, the monastery was abandoned and sold a few years later. The abbey is now next to Halton Castle to the main attractions Runcorns. During the English Civil War the castle was in the hands of the monarchists, led by Earl Rivers, the steward of Halton. It fell twice (1643 and 1644) the parliamentarians in their hands. Today Runcorn consists of the old town, which was built during the industrial revolution, and the new town, which was built in the 1970s and 1980s. In Runcorn the village of Daresbury, where Lewis Carroll was born is located. In the local Church there is a window that shows some characters from Alice in Wonderland.