From the 10th to the 11th centuries, the urban development of the country expanded (particularly on the northern coasts): new ports appeared and dukes and counts encouraged and created new towns. In other areas, urban growth was slower and centered on the monastic houses. In many regions, market towns ("burgs") with limited privileges were established by local lords. In the late 11th century, "communes", governing assemblies, began to develop in towns. Starting sporadically in the late 10th, and increasingly in the 12th century, many towns and villages were able to gain economic, social or judicial privileges and franchises from their lords (exemptions from tolls and dues, rights to clear land or hold fairs, some judicial or administrative independence, etc.). The seigneurial reaction to expanding urbanism and enfranchisement was mixed; some lords fought against the changes, but some lords gained financial and political advantages from the communal movement and growing trade.