This course is offered during the second semester of the first year, and is a core (i.e. required) for all second year students. The corse is designed to discuss the most popular experimental techniques that can be (and indeed are) exploited in the ream of Cultural Heritage. Particular emphasis will be given to those techniques hinging upon the interactions between light and matter, bacause their minimally invasive nature. Within this framework, the course will describe both the basic principles and the applications.