While these walls were built for war, they have faced their greatest trials from the unpredictable forces of nature and modern conflict. In 1667, a devastating earthquake leveled much of the city inside, yet most of these massive walls and forts stood firm, providing a protective shell that allowed the survivors to rebuild. More recently, the walls were tested during the Siege of Dubrovnik in 1991 and 1992. As you look down at the sea of red-tiled roofs, you might notice the shades of orange vary. About 75 percent of those tiles were replaced after the war, with new ones sourced from Toulouse, France, to match the original style under UNESCO supervision. The Republic of Ragusa, the predecessor to modern Dubrovnik, used its immense maritime wealth and clever diplomacy to maintain independence for centuries, ensuring this city remained a 'place of a thousand welcomes' even when surrounded by empires.