“The more I started working on her, I realized there was a need for a new catalogue raisonné and biography,” Salomon said in a phone interview. “It’s going to take many years because she has hundreds of pastels all around the world, and I am just trying to see every single one of them.”

To date, the curator has looked at more than 200 Carriera pastels—but he’s also seen plenty, that while attributed to the artist, were actually copies by other artists. Tatton Park was just one of five homes in the U.K.’s National Trust Salomon had on his itinerary, one of which had a suite of five that turned out to be the work of British artists. But he was hopeful about Tatton Park, which, according to the National Trust’s inventory, had owned The Portrait of a Tyrolese Lady, identified as the work of Carriera, since the 18th century.