Created: Thursday, 26 December 2013 04:13

Colosseum Rome Italy copyROME, ITALY—After a delay of two years, efforts to rid the Colosseum of a coating formed of traffic exhaust and organic materials, known as "black rust," are moving ahead. Thanks to a private $33 million donation, restorers will spend the next three years working in scaffolding erected over 150 feet by 150 feet sections and will clean the iconic site's walls by washing them with non-chemical solutions. Once the walls are clean, conservators will turn to restoring recent damage sustained at the site.