The fortress is depicted as a young female warrior who, without apparent effort, is preparing to throw a marble column against another woman submissive to her, the adverse Fortune, in an aerial combat. The latter, naked and made awkward by the evident imbalance, is captured in the moment of the fall from the top of a globe or from the stern of a boat that is sinking, while the furious wind of the storm has already broken the mast and ripped the sail. The composition of the painting recalls albeit mirror- inverted , the installation of the Archangel Michael and Lucifer, and, like that, was on the list of works raffled off in Ancona in 1550 and sold for four shields. The assumption is allegorical openly aimed to enhance the primary value of power, understood as an inner resource, on the Fortune whose favor silent for a moment as the wind fills the sails of the ships, and a moment later breaks the mast . A small painting belonging to a private collection, lent to the Museum - Ancient Treasure of the Holy House in 2002.
