Figure 5From: XPS characterization of (copper-based) coloured stains formed on limestone surfaces of outdoor Roman monumentsA front view of the ‘Vittoriano Entrance’ (a) [from: P.L.Porzio (editor), IL VITTORIANO-Materiali per una storia, Soprintendenza per i Beni Ambientali e Architettonici del Lazio, Fratelli Palombi Publisher, Roma, 1986] showing the location of the sampling zones and (b) a typical XPS wide spectrum of the studied Vittoriano’ samples.Back to article page