A pastoral island with lovely beaches and rows of white houses, Kos is smaller than its Dodecanese neighbor, Rhodes, and in some ways more appealing in its simplicity. Bicycles are a common sight. The ancient temple of Aslepios (the god of healing) was constructed to honor Kos's famous son Hippocrates, the father of modern medicine who lived and taught on Kos in the 6th century. Castle of the Knights of St. John, The Ancient Agora, Altar of Dionysios, Town Museum, Mosque of the Loggia, Roman Odeon.