There were in England during the later middle ages (c. 1270-1536) some 138 nunneries, excluding double houses of the Gilbertine order, which contained brothers as well as nuns. Of these over one half belonged to the Benedictine order and about a quarter (localised almost entirely in Lincolnshire and Yorkshire) to the Cistercian order. The rest were distributed as follows: 17 to the order of St Augustine and one (Minchin Buckland), which belonged to the order of St John of Jerusalem and followed the Austin rule, four to the Franciscan order, two to the Cluniac order, two to the Premonstratensian order and one to the Dominican order. There was also founded in the fifteenth century a very famous double house of the Brigittine order, Syon Abbey. Twenty-one of these houses had the status of abbeys; the rest were priories. They were distributed all over the country, Surrey, Lancashire, Westmorland and Cornwall being the only counties without one, but they were more thickly spread over the eastern than over the western half of the island. They were most numerous in the North, East and East Midlands, to wit, in the dioceses of York, Lincoln (which was then very large and included Lincolnshire, Northamptonshire, Rutland, Bedfordshire, Huntingdonshire, Leicestershire, Buckinghamshire, Oxfordshire and part of Hertfordshire) and Norwich; there were 27 houses in the diocese of York, 31 in the diocese of Lincoln, ten in the diocese of Norwich and in London and its suburbs there were seven. On the other hand if nunneries were most plentiful in the North and East Midlands it was there that they were smallest and poorest. The wealthiest and most famous nunneries in England were all south of the Thames. Apart from the new foundation at Syon, which very soon became the largest and richest of all, the greatest houses were the old established abbeys of Wessex, Shaftesbury, Wilton, St Mary's Winchester, Romsey and Wherwell, which, together with Barking in Essex were all of Anglo-Saxon foundation; and Dartford in Kent, founded by Edward III. The only houses north of the Thames which approached these in importance were Godstow and Elstow Abbeys, in Oxfordshire and Bedfordshire respectively; the majority were small priories with small incomes.