This site was added to the UNESCO World Heritage Tentative List on December 12, 2000 in the Cultural category. (en.wikipedia.org)
which was placed on the UNESCO World Heritage Site tentative list in 2013. (petesgrillandpizza.com)
The List World Heritage List World Heritage in Danger New Inscriptions Criteria for Selection Tentative Lists World Heritage List Nominations (whc.unesco.org)