1616 Jan Van Santen aka Giovanni Vasanzio for S. Pius V Ghislieri (1566/72) who believed that the waters, rich in iron, coming out of this spring would be healthy
The fountain was destroyed and rebuilt in 1662 by Andrea Sacchi (1599/1661) and Marcantonio de Rossi (about 1607/61) for Alexander VII Chigi (1655/1667)
