I recall seeing a movie when I was a young child in the early 80s about a man who fell in love with the ghost of a medieval woman.
As best as I can recollect the man was a reporter or author and was tasked with doing a report on an ancient medieval castle in Europe that was supposedly haunted by the ghost of a young, beautiful woman who has been seen by many people over the years. He visits and the ghost turns out to be real. She repeatedly appears to him and during the course of the movie the two fall in love. The problem (besides the fact that she's dead) is that her jealous husband also haunts the castle. The castle might've originally been his. He was mean and abusive and may have been involved in his wife's death and she was unhappy before and after her death. After seeing his wife and the man interacting repeatedly and seeing the affection developing between them, the husband becomes jealous and begins attacking the man. He cannot defend himself while the ghost can attack him, and the wife is afraid he'll kill the man. At one point the husband comes out of a wall and shoves the man down to the floor. The wife attempts to stop her husband from attacking the man.
A painting of the husband and wife (separately) may have been on one of the walls in the castle.
I don't remember any more than that. I only saw it once, on a cable channel. It may or may not have ever been a theatrical release. I have never been able to remember the name, and it's bugged me ever since.