Dubrovnik's unique appearance, famous the world over, has much to do with the old city walls. These are 1940 metres in length and encompass the entire Old Town. They comprise a series of fortifications, bastions and towers.
The walls were built in the period from the 13th to the 17th century in order to defend Dubrovnik from its enemies. The main land-facing wall is between 4 and 6 metres in width, while the sea-facing wall is a little narrower, between 1.5 and 3 metres. Its height is as great as 25 metres in some places and at key points there are fortifications.
To the north there is the round Minceta Fortress, to the east the Revelin Fortress, and on the south-east side, the large St John’s Fortress complex. To the west is the Bokar Fortress. Besides these fortifications, the city walls are guarded by a whole series of smaller towers and bastions.