Short answers, pulled from the story.
Ambrogio Lorenzetti emerged from the Sienese school of painting around 1317. His early life remains shrouded in mystery while his artistic roots trace back to two distinct traditions.
Siena's Palazzo Pubblico houses one of history's most significant fresco cycles painted by Ambrogio Lorenzetti. The Sala dei Nove served as the meeting place for the oligarchal assembly governing the republic where he painted three walls featuring allegorical figures representing virtues.
A specific detail in the bad government panel is the first known evidence of an hourglass existing there. This object symbolizes the passage of time under tyrannical rule within the visual narrative contrasting harmony with corruption.
An Annunciation completed in 1344 contains one of the first uses of clear linear perspective by Ambrogio Lorenzetti. Diagonals created on the floor generate a sense of depth despite the traditional gold ground used in this piece.
The earliest dated work by Ambrogio Lorenzetti is a Madonna and Child from 1319. It resides today in the Museo Diocesano in San Casciano while showing a clear debt to Byzantine art through its frontality.