Fortification accompanied settlement on the rocky site of Dubrovnik from the early Middle Ages, when the town was known as Ragusa. Stone defenses gradually replaced or incorporated earlier barriers as the community expanded and joined mainland suburbs. The surviving circuit is not the product of one campaign. Walls, towers, gates, ditches, and detached forts accumulated through repeated rebuilding, shaped by the city-republic’s need to protect a valuable Adriatic port while negotiating between larger powers.

Construction intensified from the thirteenth through sixteenth centuries. Engineers and builders including Michelozzo di Bartolomeo, Juraj Dalmatinac, Paskoje Miličević, and Antonio Ferramolino contributed to works adapted for artillery. Minčeta Tower guarded the landward high point, Bokar protected the western approach, and Revelin and Saint John defended harbor routes. Thick seaward walls and stronger landward bastions formed an integrated system. The Pile and Ploče gates controlled movement between the enclosed city, roads, and port.

The Republic maintained the defenses even when diplomacy often prevented siege. A devastating earthquake in 1667 killed residents and damaged buildings, but much of the fortification survived and was repaired. Ragusan independence ended under Napoleonic occupation in 1808, after which French and Habsburg authorities adapted military facilities. Later urban growth altered approaches and internal uses, while the walls became a historic monument and promenade. Continuous maintenance means sections contain many phases of original masonry, replacement blocks, mortar, roofs, and reconstructed details.

During the siege of Dubrovnik in 1991–92, artillery struck the historic city. Official surveys recorded dozens of direct hits on the walls and fortresses as well as extensive damage to roofs, streets, churches, and homes. Emergency protection and a major restoration program followed with Croatian and international assistance. Conservators documented impacts, repaired stonework, replaced damaged roof tiles, and addressed water penetration. Restored portions are genuine repairs to a historic defensive system, not evidence that the entire circuit was rebuilt after the war.

Today visitors can walk most of the roughly two-kilometer circuit, but the experience combines medieval and early modern fabric with later repairs, stairs, railings, ticket facilities, and safety controls. The walls frame a living city rather than an empty fortress museum. Their authenticity lies in the accumulated defensive form, setting, materials, and continued maintenance, not in untouched stone. Interpretation should distinguish surviving fortifications from reconstructed or renewed surfaces and should connect the celebrated views with the labor, political autonomy, earthquake recovery, twentieth-century bombardment, and conservation that produced the monument now seen.