I saw this movie in colour on TV in the ’70s. In it, a woman is trapped at night in a dark library. At one point she tries to get the attention of people on the street from a second floor window but no one outside notices her. She’s particularly frightened by someone or some thing that’s in the library with her (or maybe that detail was her — or my — imagination).
This may have been one story of several in the movie, anthology style, but this is the only story I remember.