Ambrogio Lorenzetti was an Italian painter active during the early 14th century, known for his contributions to the Sienese school of painting. He is celebrated for his innovative use of perspective and naturalism, which were advanced for his time. His most famous works include the frescoes in the Palazzo Pubblico in Siena, particularly "The Allegory of Good and Bad Government." Lorenzetti's art often reflects themes of civic responsibility and the impact of governance on society. His paintings depict both the idealized and the corrupt aspects of leadership, emphasizing the importance of good governance for the prosperity of the community.