"Lorenzo di Pietro (1410 – June 6, 1480), known as Vecchietta, was an Italian Sienese School painter, sculptor, goldsmith and architect of the Renaissance. He is among the artists profiled in Vasari´s Le Vite delle più eccellenti pittori, scultori, ed architettori.
It is believed Vecchietta was a pupil of Sassetta, Taddeo di Bartolo and Jacopo della Quercia. Later in his life he was the master of Francesco di Giorgio and Neroccio de’ Landi." - (en.wikipedia.org 02.12.2020)
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