ABSTRACT

C. DELLA VOLPE '·*, A. PENATI1, R. PERUZZI2, S. S I B O N I L . TONIOLO2 and C. COLOMBO2 * Department of Materials Engineering, University of Trento, Via Mesiano 77, 38050 Trento, Italy 2 CNR Research Center ‘Gino Bozza ’ per lo studio delle cause di deperimento e dei metodi di

1. INTRODUCTION

Ancient monuments are an important economic resource; millions of people travel around the world to visit them in many countries, such as Italy. But their existence and protection are also a challenge for surface science and technology.