Isidore defines Lacedaemonia as founded by Lacedaemon, son of Semele, which is consistent with Eusebius' explanation. There is a rare use, perhaps the earliest of "Lacedaemonia", in Diodorus Siculus' The Library of History, but probably with (‘’chōra’’, "country") suppressed. Lakedaimona was until 2006 the name of a province in the modern Greek prefecture of Laconia. Geography Sparta is located in the region of Laconia, in the south-eastern Peloponnese. Ancient Sparta was built on the banks of the Eurotas River, the largest river of Laconia, which provided it with a source of fresh water. The valley of the Eurotas is a natural fortress, bounded to the west by Mt. Taygetus (2,407 m) and to the east by Mt. Parnon (1,935 m). To the north, Laconia is separated from Arcadia by hilly uplands reaching 1000 m in altitude. These natural defenses worked to Sparta's advantage and protected it from sacking and invasion. Though landlocked, Sparta had a vassal harbor, Gytheio, on the Laconian Gulf. Mythology Lacedaemon (Greek: ) was a mythical king of Laconia. The son of Zeus by the nymph Taygete, he married Sparta, the daughter of Eurotas, by whom he became the father of Amyclas, Eurydice, and Asine. As king, he named his country after himself and the city after his wife. He was believed to have built the sanctuary of the Charites, which stood between Sparta and Amyclae, and to have given to those divinities the names of Cleta and Phaenna. A shrine was erected to him in the neighborhood of Therapne. Tyrtaeus, an archaic era Spartan writer, is the earliest source to connect the origin myth of the Spartans to the lineage of the hero Heracles; later authors, such as Diodorus Siculus, Herodotus, and Apollodorus, also made mention of Spartans understanding themselves to be descendants of Heracles. Archaeology of the classical period Thucydides wrote: Suppose the city of Sparta to be deserted, and nothing left but the temples and the ground-plan, distant ages would be very unwilling to believe that the power of the Lacedaemonians was at all equal to their fame. Their city is not built continuously, and has no splendid temples or other edifices; it rather resembles a group of villages, like the ancient towns of Hellas, and would therefore make a poor show.Thucydides, i. 10 Until the early 20th century, the chief ancient buildings at Sparta were the theatre, of which, however, little showed above