mnli premise: Designed in the late 13th century by Arnolfo di Cambio (architect of the Palazzo Vecchio and the Duomo) but with a neo-Gothic facade added in 1863, the Franciscan church of Santa Croce (east of the Uffizi) has an important series of Giotto frescoes. hypothesis: The Franciscan church of Santa Croce is located east of the Uffizi and features some of Giotto's frescoes.