In the meeting chamber of the Nove, the Sala della Pace in the Palazzo Pubblico, in Siena, is one of the great documents of the political ideology of a medieval city-state, part inscription and part painting, known as the cycle of Good and Bad Government. The frescoes were painted between 1338-40 by Ambrogio Lorenzetti, who was evidently a member of the group of the ruling class and known, aside from his skill as an artist, for his wide knowledge of political theory.