The various churches and cathedrals in Rome took advantage of the Jubilee to perform long-needed renovations. The facade of St. Peter's was under scaffolding for months, as centuries of grime were painstakingly removed. The Holy See also arranged to build a massive parking garage under the Janiculum hill, in order to accommodate all the buses that were expected. Construction of the garage was halted for some time due to the discovery of mosaics dating from the imperial period in previously unknown chambers under the hill. These were removed "en masse" so as to be able to complete the garage in time for the Jubilee.