Cycladic culture (also known as Cycladic civilisation) was a Bronze Age culture (c. 3100 BC – c. 1000 BC) found throughout the islands of the Cyclades in the Aegean Sea. In chronological terms, it is a relative dating system for artifacts which is roughly contemporary to Helladic chronology (mainland Greece) and Minoan chronology (Crete) during the same period of time.
General info from Wikipedia.org