The Opificio delle Pietre Dure e Laboratori di Restauro is a public institute of the Italian Ministry for Cultural Heritage based in Florence. It is a global leader in the field of art restoration and provides teaching as one of two Italian state conservation schools. The institute maintains also a specialist library and archive of conservation and a museum displaying historic examples of Pietre Dure inlaid semi-precious stones artefacts. A scientific laboratory conducts research and diagnostics and provides a preventive conservation service.