Editing Pope Leo IV (section)

===Saracen defenses=== 
He immediately began to repair the damage done to various churches of the city during the [[Arab raid against Rome]]. He restored and embellished the damaged [[Basilica of Saint Paul Outside the Walls]] and [[St. Peter's Basilica]]. The latter's altar again received its gold covering (after being stolen), which weighed 206 [[Pound (mass)|pounds]] (93.4 [[kilograms]]) and was studded with precious gems. Following the restoration of St. Peter's, Leo appealed to the Christian kingdoms to confront the Arab raiders.<ref>Pierre Riche, ''The Carolingians:A Family who forged Europe'', transl. Michael Idomir Allen, (University of Pennsylvania Press, 1993), 175.</ref>

Leo also took precautions against further raids. He put the walls of the city into a thorough state of repair, entirely rebuilding fifteen of the great towers. He was the first to enclose the Vatican hill by a wall.<ref name=catholic/> Leo ordered a new line of walls encompassing the suburb on the right bank of the [[Tiber]] to be built, including St. Peter's Basilica, which had been undefended until this time. The district enclosed by the walls is still known as the [[Leonine City]], and corresponds to the later [[rioni of Rome|rione]] of Borgo. To do this, he received money from the emperor, and help from all the cities and agricultural colonies (''domus cultae'') of the Duchy of Rome. The work took him four years to accomplish.<ref>Gregorovius, Ferdinand. ''History of the City of Rome in the Middle Ages'', vol. 3, (Annie Hamilton, tr.), 1903 ch. III "The Leonine City" pp 95ff.</ref><ref name=catholic>{{catholic|title=Pope St. Leo IV|url=http://www.newadvent.org/cathen/09159a.htm|last=Mann|first=Horace|volume=9|year=1910|access-date=23 September 2017|inline=1}}</ref>