These two magnificent tables were commissioned under Pope Pius VI and realized at the end of the 18th century by the sculptor Vincenzo Pacetti, the silversmith Giuseppe Valadier and the goldsmith Pietro Paolo Spagna.
The tables were in a bad state of preservation as the iron structures contained oxidized surfaces and the decorative bronze elements were covered with dust, grease, and old oxidizing protective agents. The restoration consisted in the complete dismantling of the decorative elements in order to restore the internal iron structure and to remove the old protective agents and other surface deposits. The metal surfaces were cleaned and the elements were stabilized through chemical treatments and a protective covering. Finally, all pieces were reassembled and the decorative elements were replaced on the work.
This 2003 conservation was courtesy of The Minnesota Chapter of the Patrons of the Arts in the Vatican Museums.