Lewes Castle is a historic fortress located in the town of Lewes, East Sussex, England. Built in the 11th century shortly after the Norman Conquest, it was constructed by William de Warenne, a close companion of William the Conqueror. The castle features two main towers and a series of defensive walls, offering a glimpse into medieval military architecture. Today, Lewes Castle is a popular tourist attraction, providing visitors with panoramic views of the surrounding area from its ramparts. The castle is managed by English Heritage and includes a museum that showcases the history of the castle and the town of Lewes.