As the number of charters granted increased, competition between market towns also increased. In response to competitive pressures, towns invested in a reputation for quality produce, efficient market regulation and good amenities for visitors such as covered accommodation. By the thirteenth century, counties with important textile industries were investing in purpose built market halls for the sale of cloth. Specific market towns cultivated a reputation for high quality local goods. For example, London's Blackwell Hall became a centre for cloth, Bristol became associated with a particular type of cloth known as "Bristol red", Stroud was known for producing fine woollen cloth, the town of Worsted became synonymous with a type of yarn; Banbury and Essex were strongly associated with cheeses.