Sismano

Sismano, a little medieval borgo, is a frazione of the Italian commune of Avigliano Umbro, in the province of Terni.

[1] The large fortified rocca with two semi-circular towers, first built in the 11th century as part of the border defenses of Todi, had 21 hearths in 1322, according to a survey at Todi[2] It was a possession of Benedetto Caetani, who spent many months here between 1281 and 1294, when he was elected pope, as Boniface VIII.

In 1324, a bloody battle was fought in the vicinity, between forces of Todi and Perugia and their friends and allies from Narni, Spoleto and Florence.

In 1461 Matteo di Ulisse Chiaravalle took it from Giacomo and Andrea degli Atti.

[3] In 1500 the Borgia Pope Alexander VI resolved the long-standing dispute in favour of the Atti, signors of Todi.