"Since 2019, various investigations have been carried out in the area of the Cotone River in the east of Selinunte. These investigations have shown that today's valley is a silted-up bay where the ancient eastern harbour of the city was located. The lecture will focus on presenting the observations for the archaic and classical phases of the zone and discussing the harbour zone in terms of its functional zones and diachronic development. Recent investigations have revealed that in the Archaic period there appears to have been a fortified harbour area with neighbouring monumental architecture. This connection can be easily compared with the urban planning of other Greek colonies."