Obol - Louis I Narbonne mint

Louis I — Louis the Pious — inherited an empire his father had spent decades assembling, and one of his earliest administrative acts was a monetary reform in 816–818 that standardized the denier and its half across Carolingian mints. Narbonne, a former Visigothic capital and still a commercially active Mediterranean port in the early ninth century, was among the authorized mints operating under this reformed system. The city sat at the terminus of trade routes connecting the Frankish interior to Iberia and the sea, which gives its small silver fractions a practical weight their modest size belies.