 They were constructed about the central part of the community with four main gates and three postern gates.Because the walls were constructed after the development of the town's streets, the positions and names of the four main gates are based on the streets they crossed; the postern gates on the other hand are located by and named after old outlying districts.The 7 gates are (clockwise from the castle; postern gates in "italics") "Linney", Corve, "Galdeford", Old, Broad, Mill and "Dinham".