Thasos or Thassos is a Greek island in the northern Aegean Sea, close to the coast of Thrace and the plain of the river Nestos but geographically part of Macedonia. It is the northernmost Greek island, and 12th largest by area. Thasos is also the name of the largest town of the island also known as "Harbour of Thasos"), situated at the northern side, opposite the mainland and about 10 kilometres (6 mi) from Keramoti.
Lying close to the coast of Eastern Macedonia, Thasos was inhabited from the Palaeolithic period onwards, but the earliest settlement to have been explored in detail is that at Limenaria where Middle and Late Neolithic remains have been found that relate closely to those of the Drama Plain. In contrast, the remains of the Early Bronze Age on the island align it with the culture that developed in the Cyclades and Sporades to the south in the Aegean.
There is then a gap in the archaeological record until the end of the Bronze Age c 1100 BC, when the first burials took place at the large cemetery of Kastri in the interior of the island. Here built tombs covered with small mound of earth were typical until the end of the Iron Age.The island was colonized at an early date by Phoenicians, attracted probably by its gold mines; they founded a temple to the god Melqart, whom the Greeks identified as "Tyrian Heracles", and whose cult was merged with Heracles in the course of the island's Hellenization. The temple still existed in the time of Herodotus.