 The diocese of Lindsey (Lindine) was established when the large Diocese of Mercia was divided in the late 7th century into the bishoprics of Lichfield and Leicester (for Mercia itself), Worcester (for the Hwicce), Hereford (for the Magonsæte), and Lindsey (for the Lindisfaras).The bishop's seat at "Sidnacester" (Syddensis) has been placed, by various commentators, at Caistor, Louth, Horncastle and, most often, at Stow, all in present-day Lincolnshire, England.The location remains unknown.