The Picture Wall at Lahore Fort, with all its extensive embellishments with tile mosaic and fresco panels, brick imitation and filigree work, represents the exceptional craftsmanship of the Mughal period. In 1981, Lahore Fort was therefore inscribed as a UNESCO World Heritage Site. The tile mosaics and frescoes have been severely damaged by disruptions to the original water drainage system and by exposure of the exterior facade to extreme weather conditions.