text:  Quite a few of them are history buffs. Some of them are just really interested in experimental archaeology and this process of learning what it was like to build and create community in the 9th century. But a lot of others, especially I would say the master craftsmen, the carpenters and the stonemasons, and the people who could actually be making a pretty decent living elsewhere in Germany or in Switzerland, and they're giving all their time to this project because...