The earliest archaeological finds go back to the eleventh century BC (Late Bronze Age III). The copper ores of Cyprus made the island an essential node in the earliest trade networks, and Cyprus was a source of the orientalizing cultural traits of mainland Greece at the end of the Greek Dark Ages, hypothesized by Walter Burkert in 1992. Children's burials in Canaanite jars indicate a Phoenician presence. A harbour and a cemetery from this period have been excavated. The town is mentioned in Assyrian inscriptions as one of the kingdoms of "Iadnana" (Cyprus). In 877 BC, an Assyrian army reached the Mediterranean shores for the first time. In 708 BC, the city-kings of Cyprus paid homage to Sargon II of Assyria (Burkert). The first coins were minted in the 6th century BC, following Persian prototypes.