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The Mosaic "The Last Judgement"

Time and environmental influences over the centuries are destroying this wonderful memorial. The dilapidation of the mosaic is mainly caused by surface damp, the polluted atmosphere and mechanical damage. So in the spring of 1993 a monitoring station was set up on the cathedral, whose records show the influence of the environmental agression on the stability of the mosaic and make it possible to decide on the conditions necassary to evaluate the suitability of protective coating.

In summer 1998, after the thorough analysis started the work of restoration headed by the professionals from the Office of the President, Prague Castle Administration and the Getty Conservation Institute from Los Angeles (USA). The restoration, including cleaning, supplementing the missing cubes, putting on a protective coating and where necessary gilding, will be followed with a regular maintenance and monitoring of the mosaic.