1.         Piazza del Duomo, Pisa (Italy) (C 395bis)

Year of inscription on the World Heritage List  1987

Criteria  (i)(ii)(iv)(vi)

Year(s) of inscription on the List of World Heritage in Danger  N/A

Previous Committee Decisions  see page https://whc.unesco.org/en/list/395/documents/

International Assistance

Requests approved: 0
Total amount approved: USD 0
For details, see page https://whc.unesco.org/en/list/395/assistance/

UNESCO Extra-budgetary Funds

N/A

Previous monitoring missions

N/A

Factors affecting the property identified in previous reports

Illustrative material  see page https://whc.unesco.org/en/list/395/

Information presented to the Bureau of the World Heritage Committee in 1994

[Oral report by the MAP/UNEP coordinator of the "100 historical sites" Programme]

Conservation issues presented to the World Heritage Committee in 1994

N/A

Analysis and Conclusions of the World Heritage Centre, ICOMOS and ICCROM

N/A

Decision Adopted: 18 BUR VI.B

This site was inscribed in 1987. The MAP/UNEP Coordinator of the 100 historical sites" Programme informed the Bureau that the Technical and Scientific Committee created in 1988 and which was responsible for evaluating the security of the Tower of Pisa, did remarkable work. A series of enquiries, measures and studies were undertaken to obtain information on all the physico­mechanical characteristics of the substratum, and to make various hypotheses of structural evolution. The intervention approved by the Technical Committee in the spring of 1992 necessitated the development of a numerical model of finite elements of the substratum and the structure. The Committee retained the solution to reduce the inclination of the tower by 1/2 degree.

The Bureau noted with satisfaction this information.