Here, we introduce a novel, water-functional and light-addressable macroscopic plasmonicphotochromic material (Figure ). The proposed novel formulation exhibits plasmon-assisted Z-E isomerization of Azo. The control over the kinetics of the photochromic reaction is granted via the thermoplasmonic effect triggered in gold nanorods (AuNRs). Our work is at the intersection of materials science, photochemistry, and thermoplasmonics and constitutes a five-fold contribution.