Michelangelo Buonarroti, Study for the Porta Pia, 1561. Chalk and ink on paper, 44.2 x 28.1 cm. Casa
Michelangelo Buonarroti, Study for the Porta Pia, 1561. Chalk and ink on paper, 44.2 x 28.1 cm. Casa Buonarroti, Florence. -- source link
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