Gallia Narbonensis was a Roman province located in the southeastern part of modern-day France. Established in the 1st century BCE, it was known for its strategic location along the Mediterranean Sea and its fertile lands. The province served as a vital trade route and cultural exchange point between Rome and the Celtic tribes of the region. The capital of Gallia Narbonensis was Massalia (modern-day Marseille), a significant port city. The province was characterized by its blend of Roman and local cultures, leading to advancements in agriculture, trade, and urban development. It played a crucial role in the expansion of Roman influence in Gaul.