The Milvian (or Mulvian) Bridge was an economically and strategically important bridge in the era of the Roman Empire and was the site of the famous Battle of the Milvian Bridge.
A bridge was built by consul Gaius Claudius Nero in 206 BC after he had defeated the Carthaginian army in the Battle of the Metaurus. In 115 BC, consul Marcus Aemilius Scaurus built a new bridge of stone in the same position, demolishing the old one. In 63 BC, letters from the conspirators of the Catiline conspiracy were intercepted here, allowing Cicero to read them to the Roman Senate the next day.
In AD 312, Constantine I defeated his stronger rival Maxentius between this bridge and Saxa Rubra, in the famous Battle of the Milvian Bridge.
During the Middle Ages, the bridge was renovated by a monk named Acuzio, and in 1429 Pope Martin V asked a famous architect, Francesco da Genazzano, to repair it because it was collapsing. During the 18th and 19th centuries, the bridge was modified by two architects, Giuseppe Valadier and Domenico Pigiani.
The bridge was badly damaged in 1849 by Garibaldi's troops, in an attempt to block a French invasion, and later repaired by Pope Pius IX in 1850.
References:The Broch of Clickimin is a large and well preserved, though somewhat restored broch near Lerwick. Originally built on an island in Clickimin Loch (now increased in size by silting and drainage), it was approached by a stone causeway. The water-level in the loch was reduced in 1874, leaving the broch high and dry. The broch is situated within a walled enclosure and, unusually for brochs, features a large 'blockhouse' between the opening in the enclosure and the broch itself. Another unusual feature is a stone slab featuring sculptured footprints, located in the causeway which approached the site. Situated across the loch is the Clickimin Leisure Centre.