This is reputedly the body of Saint Catherine Labouré (1806-1876). From Wikipedia:
When her body was exhumed, after fifty-seven years of burial, it was found to be completely incorrupt and supple.
This ventures into Cap’n Obvious Territory, but I have my doubts about the Catholic Church’s “incorruptibles.” Many of them are clearly waxworks or sculptures, and most of the information on the internet about them — and, yes, internet “research” is about as far as I’m willing to take this blog, so forgive me if this fact seems less than scholarly or rigorous — comes from the Church or from sites with a clearly religious bent.
Still, the practice of exhumation and display of corpses fascinates me, even if the bodies aren’t legit, or are doctored or wax-masked to look less “corrupt” than they actually are. And when I find images or stories of saintly bodies that appear somewhat decomposed or desiccated, I’m extra-interested, because they’re clearly real mummies or preserved corpses. Not that I believe saintliness had anything to do with it.