CIPA 2005 XX International Symposium, 26 September - 01 October, 2005, Torino, Italy 
If these aspects are not clearly understood, contemporary art 
will become a foreign body, rejected by its context, quickly 
destined to degradation among general indifference. Taking 
constant care of this modem heritage is the best way of keeping 
it alive: like more traditional 
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P.L. Benson, 2004. The conservation of four monumental 
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the Bilbao Congress 13-17 September, pp. 63-67 
A.M. Petrini, 1995. Aspetti del biodeterioramento delle fontane. 
In: La fontana di piazza Colonna, Roma, pp. 85-86 
M. Pieri, 1964. Marmi d'Italia. Graniti e pietre ornamentali, 
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G. Vigliano, 1995. Il problema dei depositi di carbonato di 
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ACKNOWLEDGEMENTS 
We would like to thank all the staff of Comune di Milano 
Arredo Urbano and particulary Arch. Silvia Volpi.