Deerpark Castle, County Galway might be considered the Weight Watchers of Irish tower houses: has all the vertical substance of a regular one, but only half the width. Erected on a natural outcrop of rock, the building is believed to date from the 16th century when this part of the country would have been under the control of the de Burgos, or Burkes a branch of which later became Earls (and eventually Marquesses) of Clanricarde. There are protruding stones on one side of the structure, suggesting an intention – probably not realised – to enlarge it, which may explain the tower’s unusual slimness. Its present name presumably derives from a later date, perhaps the 17th or 18th century, when the surrounding land was enclosed to serve as a deer park for the Burkes; its conversion into use as a dovecote most likely also occurred at this time.