The Forum of Augustus is one of the Imperial forums of Rome, Italy, built by Augustus. It was built in 42 BC to commemorate Augustus' victory at the Battle of Philippi over the assassins of Julius Caesar.
The Temple of Mars Ultor stands in the forum. It was inaugurated in 2 BC and it came to function as the focal point of Roman military strategy. For example, Augustus decreed that it should be the meeting place for the Senate when decisions of war were taken. The temple was also the place where young Roman males were ceremoniously given their adult toga, thus becoming eligible for military service, and it was the official departure point for commanders embarking on military service in the empire.
Behind the temple stands a 30 m high tufa wall which is topped with white travertine. It was constructed to separate the Forum from the hill residences behind it and to act as a firewall should a fire start in this densely-populated area of the city. In the 1st century AD Tiberius added two arches to the temple sides in honour of his two sons Drusus the Younger and Germanicus but these have now been lost except for the foundations of one. In the 2nd century Hadrian repaired parts of the building but from the 5th century the building went into decline and blocks began to be re-used in other building projects.
From the 12th century soil was added to the site and the area used for agriculture, however, as the drains were then blocked, a marsh formed until the area was drained in the 16th century.
References:The Château de Foix dominates the town of Foix. An important tourist site, it is known as a centre of the Cathars. Built on an older 7th-century fortification, the castle is known from 987. In 1002, it was mentioned in the will of Roger I, Count of Carcassonne, who bequeathed the fortress to his youngest child, Bernard. In effect, the family ruling over the region were installed here which allowed them to control access to the upper Ariège valley and to keep surveillance from this strategic point over the lower land, protected behind impregnable walls.
In 1034, the castle became capital of the County of Foix and played a decisive role in medieval military history. During the two following centuries, the castle was home to Counts with shining personalities who became the soul of the Occitan resistance during the crusade against the Albigensians.