In the Middle Ages, Seaford was one of the main ports serving Southern England, but the town's fortunes declined due to coastal sedimentation silting up its harbour and persistent raids by French pirates. The coastal confederation of Cinque Ports in the mediaeval period consisted of forty-two towns and villages; Seaford was included under the "Limb" of Hastings..Between 1350 and 1550, the French burned down the town several times. In the 16th century, the people of Seaford were known as the "cormorants" or "shags" because of their enthusiasm for looting ships wrecked in the bay.!