This excellent vintage poster is for the Italian nunsploitation flick Interno di un covento, which was known in English as, alternately, Within a Cloister, Within the Convent, and Behind Convent Walls. So, what exactly goes on behind convent walls? Well, they have lots of sex. With each other and with whatever men happen to be around. And they exercise naked a lot. Well, almost naked. They never take off those cornettes, no matter what, but everything else is on display, including some really lovely bushes.

All of this depravity is the work of Polish director Walerian Borowczyk, working from a novel—a novel!—by the French writer Stendhal, aka Marie-Henri Beyle. But we’re giving Borowczyk most of the credit, er, blame here, because we don’t think Stendhal had a scene in his book where a nun devirginized herself with a Jesus-faced dildo. What’s the plot here? It isn’t important. The question is, what’s the point?

Well, we’re talking about a movie made in Italy, so the point seems to have been to annoy the very powerful Catholic Church. Mission wholly accomplished, we suspect. We gotta say though, we have never gotten this fascination with nuns. But if that’s your thing, then this is your movie. It premiered in Italy today in 1978. We have a nice collection of production photos below, and if you just can’t get enough nunnage, check out this amusing post.