EmperorDalek | Points

There used to be a movie on Netflix that was made in France sometime after 2000, involving a man who keeps losing his memory after having sex with a particular woman, who then (I believe) uses this to...

I'm pretty sure you're talking about John Carpenter's 'Prince of Darkness': https://www.youtube.com/watch?v=MWbFni6_25Y https://m.imdb.com/title/tt0093777/?ref_=nv_sr_srsg_0 It was an abandoned church...