The innovative solutions adopted by the archaeological park of Pompeii and the Portuguese city of Evora pave the way for an inspiring model: turning architectural constraints into assets, boosting heritage and sustainability.Some of them might have bumped into the sheep which have been recently introduced to mow the grass in the archaeological park.Since we needed an extensive lightning system, we could either keep consuming energy, leaving poles and cables around and disfiguring the landscape, or choose to respect it and save millions of euros."Together with Alkmaar, in the Netherlands, the Portuguese city is one of the demo sites that are testing innovative solutions aimed at combining sustainability with the valorization of architectural and cultural heritage, within the European project Pocityf.Solutions like Tegosolar and traditional PV tiles are crucial for matching sustainability with conservation, protection, and enhancement of heritage."