Pisa Charterhouse, also Calci Charterhouse or Val Graziosa Charterhouse (Italian: Certosa della Val Graziosa di Calci), is a former Carthusian monastery, now the home of the Pisa Museum of Natural History. It is 10 km outside Pisa, Tuscany, Italy, in the comune of Calci. The monastery is noted for the fresco of the Last Supper, by Bernardino Poccetti (1597).