The idea of putting solar panels on ancient ruins, like those in Pompeii, would alarm most people. But an innovative Italian company (Dyaqua) is using a polymer to create realistic "terracotta" roof tiles. These tiles look and function like roof tiles, are installed in a fairly similar manner, but include a layer of PV cells under a protective polymer layer. The polymer aids photon absorption, thus not obstructing the PV cells.
https://techxplore.com/news/2022-12-disguising-solar-panels-ancient-roman.html