Sant'Apollonia, a former Benedictine convent founded in 1339, is now home to the Museo di Cenacolo di Sant'Apollonia. The highlight of this museum is the well-preserved fresco "The Last Supper" by Andrea del Castagno, along with other works by notable artists like Neri di Bicci and Raffaello da Montelupo. Located just north of the city center, this hidden gem offers a glimpse into the rich artistic history of Florence.