Crete (, ; Ancient Greek: , Krḗtē) is the largest and most populous of the Greek islands, and the fifth-largest island in the Mediterranean Sea, after Sicily, Sardinia, Cyprus, and Corsica. Crete and a number of surrounding islands and islets constitute the region of Crete , one of the 13 top-level administrative units of Greece. The capital and the largest city is Heraklion. As of 2011, the region had a population of 623,065.