Saint-Louis, located in northwestern Senegal at the mouth of the Senegal River, was once the colonial capital of Senegal and French West Africa. With a population of 254,171 in 2023, the city is known for its well-preserved 19th-century colonial architecture, which earned it a UNESCO World Heritage designation in 2000. Saint-Louis was a key economic center during the colonial period and remains a cultural hub, attracting tourists with its festivals, including the famous Saint-Louis Jazz Festival, and its vibrant arts scene. Despite facing challenges such as climate change and overfishing, the city continues to thrive as a center for tourism, sugar production, and fishing.