Andrzej Zulawski's Possession is a 1981 psychological horror film about a woman whose life is thrown into chaos when her husband begins to suspect she is possessed by a mysterious entity. The film follows the couple as they attempt to unravel the mystery of the possession
From Wikipedia
Andrzej Żuławski was a Polish film director and writer best known for his 1981 psychological horror film Possession. Żuławski often went against mainstream commercialism in his films, and enjoyed success mostly with European art-house audiences.