13 Ghosts (1960)

13 Ghosts is a 1960 American horror film directed by William Castle. The story follows a family who inherits a house inhabited by multiple visible spirits, revealed through a special viewing device. Produced during the era of theatrical gimmicks, the film blends supernatural themes with light suspense elements.

Från IMDB:
A family inherits a house with 12 ghosts who want a 13th.