Caska, Croatia

Caska is a village on the Croatian island of Pag, situated at the site of the ancient Roman settlement of Cissa. Originally a Liburnian settlement on nearby Košljun hill, it developed into an important Roman maritime center linked to the senatorial Calpurnii Pisones family. Archaeological excavations from 2003 to 2007 uncovered 44 cremation graves dating to the 1st-4th centuries AD, while underwater investigations revealed three scuttled Roman vessels -- sewn boats and a mortise-and-tenon ship -- deliberately sunk to form pier-like harbour structures. The settlement was destroyed by an earthquake in 361 AD, when part of it sank into the sea, and its submerged ruins remain visible in Caska Bay.