The fortresses gave the town the name luka kula (Croatian, 'harbour of fortresses'). Of these thirteen, four are still preserved. The building of the fortressed paid off: a large attack by Turkish forces in 1571 was successfully repelled.
The name Luka Kula reflects the town's history as a fortified settlement.  The success of the fortifications in defending against a large Turkish attack in 1571 is highlighted.