Sienese Art: 杜喬, 馬提尼, and Lorenzetti

Works discussed:
Duccio di Buoninsegna, Madonna Enthroned, C. 1285 (烏菲茲美術館, 佛羅倫薩)
西蒙娜·馬提尼, Annunciation Altarpiece, 1333 (烏菲茲美術館, 佛羅倫薩)
安布羅焦·洛倫澤蒂, Effects of Good Government in the City and in the Country, 1338-1339 (Sala della Pace, 公共建築, 錫耶納)

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