Greece, Kos Island - the Castle of the Knights of Saint John

Cos Island, located in the southeastern Aegean Sea, is the third largest island of the Dodecanese. It has a rich history, being mentioned in the Iliad and known by various names over time. The island's economy has historically relied on tourism, wine, and silk. The Knights of Saint John constructed a castle on the island, showcasing diverse architectural styles. The castle's construction spanned over 130 years, reflecting influences from different eras.

What is the population of the island of Cos as of the 2011 census?

What were the ancient names of the island of Cos mentioned in the text?

What is the main industry of the island of Cos?

Who was the founder king of Cos according to classical mythology?

What architectural feature connects the two precincts mentioned in the text?