A rocky islet and a nearby hillside have yielded evidence of one of Greece's oldest and most enigmatic ritual sites. Imported stones and fragmented marble statuettes show that Dhaskalio and Kavos were "a symbolic central place for the Early Bronze Age" in the Aegean, according to Professor Colin Renfrew. Kavos is a stony, scrub-covered slope on the Cycladic island of Keros. Forty-five years ago Professor Renfrew, then a PhD student at Cambridge, found extensive looting there, with fragments of marble bowls and the famous Cycladic folded-arm figurines scattered across the surface. The date of the Dhaskalio Kavos site, based on...