The Old Town is where life started on what used to be an island secured by medieval walls. The city had seven gates, three of which have been preserved to this day: The Gate of St. Benedict, The Portica and The Gate of the Holy Cross. The first archeological traces of life date back to the Bronze Age, and the old city started developing in the 3rd century. The limited space conditioned the construction of narrow houses, narrow streets and small squares. It's an unique place to visit.
The town clock and a small fountain are located on the main town square. The town clock once represented the tower on the south corner of the former town walls. Built in the 12th century, the tower was extended several times. The town clock with its Venetian lion, the symbol of Serenissima dating back to mid-19th century, was situated on the town gate fort near the Califfi Palace.
http://www.rovinj.co/en/meet-rovinj/culture-and-history/