Other works of Arnolfo, such as the Braye tomb at Orvieto, show an intimate artistic alliance between him and the Cosmati.
In prehistoric times the river ran straight on along the valley of the Chiana and joined the Tiber near Orvieto; and there was a great lake, the north end of which was at Incisa and the south at the lake of Chiusi.
Patrizio, is one of the chief curiosities of Orvieto.
It was begun by the architect Antonio da San Gallo the younger in 1527 for Clement VII., who fled to Orvieto after the sack of Rome, and was finished by Simone Mosca under Paul III.
Communal independence had probably been acquired as early as the end of the 10th century, but the first of the popes to reside in Orvieto and to recognize its communal administration was Hadrian IV.