Ark of Fools(1990)

Original title: Archa bláznů aneb Vyprávění z konce života

Set in a bleak, filth-ridden provincial hospital, a disillusioned doctor begins to find the philosophical ramblings of a mental patient more stimulating than the company of "sane" society. As their relationship deepens amidst the grimy and decaying wards, the doctor's own mental health is called into question by his suspicious colleagues.