revelin bridge and the walls of the old city, dubrovnik, croatia

13th 17th 940 adriatic ancient architecture brick bridge built castle centuries city cityscape croatia dalmatia defence defensive dubrovnik europe european former fort fortification fortress gate gothic height heritage highest historical history landmark medieval meters mighty neretva old outside ploae ploäe point reach revelin sea stone stretch symbol system tourism tower town travel unconquerable unesco view walled walls yugoslavia