Rhodes is the principal city and a former municipality on the island of Rhodes in the Dodecanese, Greece. Since the 2011 local government reform it is part of the municipality Rhodes, of which it is the seat and a municipal unit. It has a population of approximately 90,000 in its metropolitan area. Rhodes has been famous since antiquity as the site of Colossus of Rhodes, one of the Seven Wonders of the Ancient World. The citadel of Rhodes, built by the Hospitalliers, is one of the best-preserved medieval towns in Europe, which in 1988 was designated as a UNESCO World Heritage Site. The city of Rhodes is a popular international tourist destination.