Dodecanese relative quiet and prosperity. In 408 BC, the three cities of Rhodes had united to form one state, which built a new capital on the northern end of the island, also named "Rhodes"; this united Rhodes was to dominate the region for the coming millennia. Other islands in the Dodecanese also developed into significant economic and cultural centers; most notably, Kos served as the site of the school of medicine founded by Hippocrates. However, the Peloponnesian War had so weakened the entire Greek civilization's military strength that it lay open to invasion. In 357 BC, the islands were conquered by
Pserimos Pserimos Pserimos () is a small Greek island in the Dodecanese chain, lying between Kalymnos and Kos in front of the coast of Turkey. It is part of the municipality of Kálymnos, and reported a population of 80 inhabitants at the 2011 census. The main industry is tourism, with Greek and other European holidaymakers attracted by its remote location. There are several beaches and a number of taverns, some of which offer accommodation. Pserimos is served by a daily ferry from Pothia, on the island of Kalymnos, and is a destination on the itinerary of a number of cruise boats