The tree-lined San Marco Square in the San Giovanni district, is a place where memories of the Medici family abound, and where convent complexes of several religious orders are found, in addition to several universities. The Aula Magna, or Great Hall, and the Rectorate of the University of Florence face the square in a building that was originally the Grand Duke's Stable. If you see a long line, it's full of people eager to admire the original David by Michelangelo, which is kept in a Museum in the great complex that houses the Academy of Fine Arts.