Hall of Justice.
Its interior is decorated with a great astrological cycle composed of over three hundred panels arranged in three bands, inspired by the doctrines of the physician, astronomer and astrologer Pietro d'Abano and originally painted by the greatest artist of the time: Giotto. Palazzo della Ragione, which has also been called a 'ship to sail the skies', thus became a 'prediction machine', a microcosm in which human activities were judged taking into account the influence of the celestial bodies.In the 13th century, the appearance of Palazzo della Ragione was very different from what we see today. Originally, the upper floor was divided into three sections, with a central hall in which four columns supported a trussed roof.In the early years of the 14th century Fra' Giovanni degli Eremitani remodelled the palace, introducing two new elements: the roofing and the two-floor loggias.