Kos is a popular Greek holiday island in the Aegean Sea. It is part of the archipelago of the Dodecanese. The island is 295 km2 and has around 30,000 inhabitants. The island is best known to Hippocrates, who lived on the island. The “tree of Hippocrates,” a 12-meter-high plant tree, stands in the middle of Kos Town. The tree is believed to have formed the framework of Hippocrates’ teaching.