Launceston Castle, in good repair, is a Norman motte-and-bailey castle, and was built by Robert, Count of Mortain (half-brother of William the Conqueror) c.1070 to dominate the surrounding area. Launceston was the caput of the feudal barony of Launceston and of the Earldom of Cornwall until replaced by Lostwithiel in the 13th century. Launceston was later the county town of Cornwall until 1835 when Bodmin replaced it. The lands of Robert, Count of Mortain, became the core holdings of the feudal barony of Launceston, and the Fleming family continued to hold most of their manors from that barony, as can be seen from entries in the Book of Fees. In the Domesday Book (1086) it is recorded that Launceston was held by the Count of Mortain, and that he had his castle there. There was land for 10 ploughs, 1 villein and 13 smallholders with 4 ploughs, 2 mills which paid 40 shillings (£2 sterling) and 40 acres of pasture. The value of the manor was only £4 though it had formerly been worth £20. The Roman Catholic martyr Cuthbert Mayne was executed at Launceston a legacy of memorials and a church exists.