Agora of the Competaliasts, Ancient Greek marketplace in Delos, Greece

The Agora of the Competaliasts is a paved open square forming a crossroads between several streets, directly beside the Sacred Harbour of Delos. Its gneiss flagstones are pierced with holes where tent poles were set. In the centre stand the bases of a square and a round marble monument, both dedicated to Hermes; the Portico of Philip and a small Ionic temple of Hermes lie to the north, and shop ruins to the east and south.

The marketplace was built in the last quarter of the 2nd century BC as a commercial center serving merchants, bankers, and sea captains near the harbor. It reflects the economic prosperity of Delos during this period and its role in flourishing Mediterranean trade networks.

The site was dedicated to Hermes, the god of commerce, reflecting its role as a trading hub. Two marble monuments in the center and an Ionic temple to the north show how merchants and visitors connected their business with divine protection.

The square sits directly beside the Sacred Harbour, with the Portico of Philip and the Ionic temple of Hermes in its northern part and shop ruins to the east and south. The ground is paved with gneiss and uneven, so wear sturdy shoes; the open expanse offers little shade at midday.

The name comes from the Competaliasts, a brotherhood of freedmen and slaves who honoured the Lares Compitales, deities whose festival was the Compitalia. Their market square lay beside the Sacred Harbour, where the bases of a square and a round marble monument to Hermes still stand among dedications left by merchants, sea captains and bankers.