Early missionaries targeted tribal leaders, knowing the people would follow, and new religious communities soon dominated the landscape. The 7th century Nendrum Abbey beside Strangford Lough was a focal point for nearly a millennium. Computer graphics overlay the landscape to build a picture of a functioning community. The monks used tidal power to mill flour - possibly the oldest example of this early technology in the world.
For students interested in early Christianity in Ireland, this clip gives a good introduction to one of the best preserved ruins. It may also be of use in understanding the technology of the tidal mill and what life might have been like in the monastery.