The largest urban project of those times in Dalmatia was the complete design of two new towns – "Small and Large Ston". The most important feature of those towns was a city wall which was about a " kilometer of wall" with guard towers along the walls built in the 14th Century. Hadrian's wall in Scotland is the longest wall in Europe, and these walls are of similar importance in the Balkans. With these walls the entire Pelješac Peninsula was surrounded and protected from the Adriatic Coast and from the landward part of the cities with an aim to protect the most valuable possession of the Republic of Dubrovnik – salt from Ston.