The researchers were conducting a study of an ancient harbour as part of the "Istrian Undersea" project, an initiative to document and list the underwater sites off the Croatian coast.Barbariga is located on the Barbariga Peninsula, which used to be called Punta Cissana for the legendary ancient city of Cissa. During antiquity, the region was a centre for the production of olive oil, a commodity which was exported throughout the northern Adriatic.Previous studies of the Roman harbour places it in the 1st century AD, which likely functioned as an extension of an olive oil mill in the Barbariga locality for...