This magnificent mixture of medieval and Baroque started out life as the Porta Praetoria, the gates of a Roman settlement founded in 28 BC. The gate''s remains were transformed into a medieval castle during the 13th century. It wasn''t until the 15th century, however, that a Turin nobleman turned it from castle-fortress to royal palace. The ''Madama'' in question is Maria Cristina of France and then Maria Giovanni Battista of Savoie Nemours. Tourists will find that the most notable attractions of the Palazzo Madama include its Baroque facade and grand sweeping staircase. Throughout its history, the palace has had many uses. Today, it serves as the home to Turin''s Museo Civico d''Arte Antica.