Santo Stefano d'Aveto Castle controlled the roads from the Apennines to Emilia. It was probably built int the 12th century, first time documented in 1164.
The castle that presents itself now is an interesting pentagonal structure with ramparts on four of the five perimetral corners. In ancient times the arms square could be reached, an area onto which the different rooms on the ground floor open, using drawbridges that were easy to lift in case of attacks.
References:The Temple of Edfu is one of the best preserved ancient shrines in Egypt. It was built in the Ptolemaic Kingdom between 237 and 57 BC.
Edfu was one of several temples built during the Ptolemaic Kingdom, including the Dendera Temple complex, Esna, the Temple of Kom Ombo, and Philae. Its size reflects the relative prosperity of the time. The present temple initially consisted of a pillared hall, two transverse halls, and a barque sanctuary surrounded by chapels. The building was started during the reign of Ptolemy III Euergetes and completed in 57 BC under Ptolemy XII Auletes. It was built on the site of an earlier, smaller temple also dedicated to Horus, although the previous structure was oriented east–west rather than north–south as in the present site.