Lindsey , an early Anglo-Saxon kingdom and bishopric, probably eng with the modern districts East Lindsey and West Lindsey in Lincolnshire. It was an area of early settlement by the Angles and was ruled by its own kings until the late 8th century. Northumbria had controlled Lindsey in the mid-7th century, but lost it finally to the Midland kingdom of Mercia in 678. The Danes raided Lindsey in 841, wintered at Torksey in 873 and settled there soon after. Lindsey appears to have been recaptured by the Anglo-Saxons in 918, but place names show that Danish settlement there was very intense and that Lindsey defeated the Danish invaders Sweyn and Canute in the early 11th century supported.
The Roman missionary Paulinus converted Lindsey to Christianity around 631 and had a diocese which Theodore of Canterbury founded in 679. it flourished up until the time of Danish settlement. In the mid-10th century the diocese was apparently associated with that of Dorchester on Thames (Dorchester, Oxfordshire); After the Norman Conquest (1066) the lake was moved from Dorchester to Lincoln.