Medieval gateway positioned close to Winchester's Great Hall, with portcullis slot and early gunports. Interesting graffiti from its use as a debtors' prison from the 16th to the 18thC. Contains unique collection of the city's weights and measures, including the Winchester bushel and the standard yard of Henry VII's reign. Displays also include a fine ceiling from Winchester College painted to celebrate Queen Mary I and Phillip of Spain's marriage in 1554. Also armour, gibbet, leg-irons. Good views of Winchester High Street from the roof. Brass rubbing. Children's quiz.