There was a great period film made near my home in the 70s called Somewhere In Time starring Christopher Reeve. It came out in 1980 and was (and is) huge where I live in Michigan. Here is a description of the movie:
A playwright becomes obsessed with an old portrait of a famous actress, and as he researches her life he becomes increasingly fascinated with the real woman. He uses self-hypnosis to send himself back to 1912 and meet her in person, and they soon fall in love - a situation complicated by her jealous manager. Romantic fantasy, starring Christopher Reeve, Jane Seymour and Christopher Plummer.
I am now loving a new TV series on channel PBS called Downtown Abbey. It's not a movie but when I first started watching it, I watched for 4 hours straight and because there are no commercials it was hard to tear myself away for bathroom breaks! If you enjoy historical dramas you HAVE to see this. It follows the lives of an influential family and it's hired help and how they intertwine around WW1 and life in the early 1900s England. Fascinating!