The Monk is a French horror film. I'm not sure about the comparison to 'The Woman in Black' on the cover, yes this is a superior film, but it's also a very different film. This is a more contemplative horror film, in fact it wasn't until the film had finished that I made some of the connections.
The story concerns a monk, who as a baby was left on the doorstep of a monastery. He grows up with the monks and when he comes of age joins the order. He becomes known as a pious man whose sermons are famed for their eloquence and faith.
At its heart this is a Faustian tale that deals with temptation in the context of religious experience. That is one of it's more interesting aspects. Most horror films have religious tones or aspects, but this deals with the experience of faith and it's consequences.
I found a few of threads of the film predicatable, but some also surprised me, although when I thought about it the signs were there to see. I like that in a film, it lets you think about what it's telling you. Overall this is an interesting and intelligent horror film, well worth watching.