Santuario della Pazienza has been created by Ezechiele Leandro in San Cesario, near Lecce, between 1962 and 1981 when the artist died. It consists of several statues in concrete on a iron structure, where Leandro included small pieces of pottery, glasses and other scrap materials. Nowadays Santuario's restoration has to be undertaken due to degradation phenomena, like detachment of concrete pieces or rusting of the iron structures. A formerly proposed intervention foresaw the coverage by Plexiglas sheetings above the garden. This solution is not acceptable and the protection of the surface of each figure is proposed instead. As a result, the characterization of Leandro's materials has been carried out along with the testing of some protective coatiings and the relevant results are reported in the present communication