Francesco di Giorgio e di Lorenzo (1412 – June 6, 1480), known as Vecchietta or Lorenzo di Pietro, is 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 is the master of Francesco di Giorgio and Neroccio de’ Landi.