The Tour Mélusine is the keep of a former castle in the commune of Vouvant in the département of Vendée in France. This keep and watchtower, built at the end of the 12th century or the beginning of the 13th century, is the only vestige of the ancient castle of the Lords of Lusignan built in the present location of the "Place du Bail". This castl…The Tour Mélusine is the keep of a former castle in the commune of Vouvant in the département of Vendée in France. This keep and watchtower, built at the end of the 12th century or the beginning of the 13th century, is the only vestige of the ancient castle of the Lords of Lusignan built in the present location of the "Place du Bail". This castle was separated from the fortified town of Vouvant by a moat. A chapel, long gone, was leaning against the tower.