April 28, 1997, members of the constituted Reflection Group at the time of the fifth international Convention on the dry stone resulted in October 1996 from Imperia, Italy, are united himself to the Valley, France to create the:
International scientific society
for Drystone interdisciplinary study S.P.S.
August 2, 1997, the association appeared to the Official Newspaper.
Since the SPS keep the link..
..between researchers, craftsmen, associations, individuals.
13th International Congress on Drystone Walling

To come in october, 2012
Ogliastra department, Sardinia, Italy.