Prior to 1200, markets were often held on Sundays, the day when the community congregated in town to attend church. Some of the more ancient markets appear to have been held in churchyards. At the time of the Norman conquest, the majority of the population made their living through agriculture and livestock farming. Most lived on their farms, situated outside towns, and the town itself supported a relatively small population of permanent residents. Farmers and their families brought their surplus produce to informal markets held on the grounds of their church after worship. By the 13th century, however, a movement against Sunday markets gathered momentum, and the market gradually moved to a site in town's centre and was held on a weekday. By the 15th century, towns were legally prohibited from holding markets in church-yards.