 The average "túath" was small, perhaps 500 square kilometres in area with a population of some three to four thousand.Osraige was atypical, much larger than this, covering perhaps 2000 square kilometres astride the River Barrow in the modern counties of Kilkenny, Laois, and Offaly.In principle, each "tuath" had its own king and court and bishop, but political power generally rested with the provincial over-kings.