Fisherman and free-diver Giacomo De Mola was using sonar technology to scan the seafloor off the southwest coast of Sicily when he spotted something unusual beneath the waves. De Mola, who was out exploring with his friend Igor Bisulli, decided to dive in for a closer look.

Italy’s first Capital of Contemporary Art, Gibellina in western Sicily has brought together painters, photographers and other creatives paying tribute to its turbulent past and resilient spirit.

The discovery was made by an underwater fisherman who described it as the "most incredible" in his life.