Thanks to the Met Open Access initiative my friend Perry Garvin captured these images for photogrammetry with his phone camera. This is the resulting model which I have aligned and meshed using Reality Capture and cleaned up and textured in Rhino and ZBrush. The tops of the heads were unreachable as we did not have a ladder inside the Metropolitan Museum of Art.
To see more about this sculpture follow this link: https://www.metmuseum.org/art/collection/search/248483?searchField=All&sortBy=Relevance&ao=on&od=on&ft=marble+grave+stele&offset=0&rpp=20&pos=1