Increasing productivity stimulated trade, the improvement of roads and bridges, and the growth of towns, as well as competition for the profits of agrarian lordship. After about 1050, townspeople, especially merchants, sought to free themselves from the arbitrary lordship of counts and bishops, usually peaceably, as at Saint-Omer, but occasionally in violent uprisings, as at Le Mans and Laon. Town life continued to flourish. A few places, favoured by political, ecclesiastical, and economic circumstances, grew far larger than the rest. Paris could probably count close to 200,000 inhabitants by the late 13th century, and some great provincial centres—e.g., Toulouse, Bordeaux, Arras, Rouen—may have surpassed 25,000, but most of the older cities grew more modestly. Jewish communities, which existed almost everywhere, were especially important in the towns of Champagne and Languedoc. Emigration from the countryside probably increased as peasants sought better opportunities and independence, yet the towns remained somewhat indistinct in appearance and activity from their rural surroundings. Many urban properties had agrarian attachments, often within the walls; Paris itself was, to a surprising extent, an aggregation of expanded villages. Nevertheless, the progress of commerce, together with an important ancillary development of industry, chiefly accounts for medieval urban prosperity.

The trades not only grew in volume but also became more diversified and specialized. New markets, often regional in nature, arose to supplement the older centres that had developed on the basis of the long-distance exchange of relatively high-priced imperishables. Regional markets featured agrarian staples such as grains and wines as well as animals, cloth, weapons, and tools, and they facilitated the introduction of foreign goods, such as glassware and spices. An increasing reliance on coinage or on monetary values may be connected with these provincial trades; sensitivity to the intrinsic values of the many French coinages was increasing everywhere toward 1200, even in the hinterlands away from main trading routes. In the late 13th century the need for money in denominations larger than the age-old penny (denarius)—primarily for use in the great commercial centres—caused Louis IX (reigned 1226–70) to issue the gros tournois (worth 12 pennies) and the gold coin (which, however, had little importance before the 14th century). A gradual long-term inflation tended to favour commercial activity.

The towns of northern France, notably in Artois, Burgundy, the Île-de-France, and especially Champagne, prospered not only from regional exchange but also from the great overland trade flows connecting Normandy, England, the Baltic, and the Low Countries with the cities of Italy. The fairs of Champagne, becoming the leading entrepôt of European merchants, reached their apogee in the 13th century. Favoured by the count’s privilege, the traders operated at Lagny, Bar-sur-Aube, or—in greater numbers—Provins and at the “warm fair” of Troyes in June; the “cold fair” of Troyes ended the yearly cycle in October. The fairs were designated as occasions for payment and repayment, contributing significantly to the progress of banking and business accounting.

Enlarged and more diversified demand encouraged urban growth and prosperity. Townsmen were eating better: in the north, at least, the per capita consumption of meat, butter, and cheese, as well as of spices, seems to have increased by the 13th century. As for wine, not only was more being drunk but the taste for vins de qualité became more acute, and the great regional vintages, notably that of Gascony, were established. Townspeople furnished their houses more amply than in the past (lamps, wooden chests, and draperies came into common use), and they produced more articles themselves.

The progress of industry, in fact, was a remarkable feature of the period. Crafts in metal, wood, leather, and glass expanded in such large towns as Paris. Cloth work—weaving, dyeing, fulling—prospered in regional centres such as Toulouse, with specialities in fine cloths concentrated in Artois and Flanders. In most places, however, the crafts remained in the shadow of commercial enterprise, in which greater fortunes continued to be made. Artisanal associations proliferated everywhere; often termed brotherhoods (confratria, confraternitas), they fostered new urban and suburban solidarities for charitable and ceremonial purposes as well as for the promotion of economic interests.

Urban society became more competitive and more stratified. At Lyon, Bordeaux, and elsewhere, some fortunes were established enough, usually from commerce, to enable their possessors to live as landlords, build stone houses, buy rural property, and aspire to titles of nobility. This patriciate—despite occasional setbacks at the hands of “new men,” a rising class of administrators chosen over men of high birth for their expertise in politics—dominated municipal governments, acting as mayors and magistrates (échevins) in the north or as consuls in the south. While not altogether self-serving—they supported civic projects such as the building or decorating of churches—they were disinclined to share power. Below them, often as their tenants or debtors, were small entrepreneurs, middlemen in trade (or between local industry and regional trade), master craftsmen, and bankers; and below all—and increasingly restive—was a swelling class of impoverished artisans, servants, vagabonds, and beggars.