This is a Build and Destroy, Real Time Strategy game modeled after the Viking attacks on the monastery at Lindisfarne. You play defense against the Vikings. You also need to protect your Archbishop and numerous relics. This is a very devout community and there are dozens of priests and three monasteries.
The map is quite attractive and the home island is quite well designed. There are ample resources on the island and a lot of villes ready to work on them to build a strong economy.
Don't play this on Standard Difficulty. If you do, some triggers will fail because the Vikings will not even attempt to kill enemy hostages. They will just stand next to them. Play on at least Moderate.