The triumphal arch was built in 203
A.D. to commemorate the victories of emperor Septimius
Severus in Parthia (now partly Iran and Iraq).
The arch
is 23m high and 25m wide. It has three archways: the
central one is 12m high and the others 7m 80cm. Originally
a flight of stairs led to the central archway. It was
only replaced by a road in the 4th century.
The relief panels at the top depict
various stages of the war between the Romans and the
Parthians. Other panels show Romans capturing barbarians.
Originally the arch was topped by a bronze quadriga
with the emperor Severus and his two sons, Caracalla
and Geta. Bronze inscriptions in the attic dedicated
the arch to Septimius Severus and both of this sons,

but soon after Septimius's
death, Caracalla killed his brother Geta and had his
name removed from the arch.
The arch of Septimius Severus is one
of the best preserved monuments on the Forum Romanum
thanks to its incorporation in an old church in the
middle ages.
The church later moved to another location
but it was still owner of the arch, thus protecting
it from destruction. While parts of other arches like
the
Arch of Titus were used for the construction of
Renaissance palaces, the Arch of Septimius Severus was
left untouched.
During the middle ages and until the
18th century,

when the excavation of the Forum Romanum
started, a large part of the arch was covered in soil
and debris.
The arch of Septimius Severus is located at the western end of the Forum, near the capitoline hill.