Ptomemy's Map of Ireland

Because Claudius Ptolemy chose to begin his description of the known world-the Oikumene in the extreme northwest, Ireland was given pride of place in the Geography.

Book 2, Chapter 2 comprises a list of forty geographical features, together with their latitudes and longitudes, and the names and approximate locations of known tribes.

These sixty items fall into the following categories:
  • 5 Promontories or headlands
  • 15 River mouths or estuaries
  • 11 Towns or settlements
  • 9 Offshore islands
  • 20 Tribes