The Church (Italy, 1988)

Director Dario Argento is very famous for his horror movies. His unique style shaped Italian horror cinema. In this movie, a group of archeologist work in the catacombs of an old church. Apparently, a group of devil worshippers were buried beneath this church before its construction, at the time of the Crusades. When one of the archeologists opens a door by mistake, all hells breaks loose, literally! He becomes infected with the "zombie" virus, or whatever you wish to call it, and he starts killing other people. A group of persons, including small children who were doing a tour of the church with their teacher, get trapped inside the holy recinct and one by one they start to die. I did not like the sect and devil worshipping scenes, it makes it look a little cheezy. Nevertheless, the story is coherent and the suspense does build up nicely up until the end.