Rhodes is the largest of Greece's Dodecanese islands and their historical capital; it is the ninth largest island in the Mediterranean Sea. Administratively, Rhodes constitutes a separate municipality within the Rhodes regional unit, which is part of the South Aegean administrative region. The principal town of the island and seat of the municipality is the city of Rhodes, home to 50,636 inhabitants according to the 2011 census. By 2022, the island’s population had grown to 125,113 people. Located northeast of Crete and southeast of Athens, Rhodes is often referred to by several nicknames: the "Island of the Sun" after its patron sun god Helios; "The Pearl Island"; and "The Island of the Knights", a reference to the Knights of Saint John of Jerusalem, who ruled the island from 1310 to 1522.