Over the next eight centuries, Irish, Scottish, and English missionaries reintroduced Christianity into the German territories. During the period of the Frankish Empire, the two most important of these missionaries were Columbanus, who was active in the Frankish Empire from 590, and St. Boniface, who was active from 716. The missionaries, particularly the Scottish Benedictines, founded monasteries ("Schottenklöster", Scottish monasteries) in Germany, which were later combined into a single congregation governed by the Abbot of the Scots monastery at Regensburg. The conversion of the Germanic peoples began with the conversion of the Germanic nobility, who were expected to impose their new faith on the general population. This expectation was consistent with the sacral position of the king in Germanic paganism: the king is charged with interacting with the divine on behalf of his people. Hence the general population saw nothing wrong with their kings choosing their preferred mode of worship. The favoured method of showing the supremacy of the Christian belief was the destruction of the holy trees of the Germans. These were trees, usually old oaks or elm trees, dedicated to the gods. Because the missionary was able to fell the tree without being slain by the god, his Christian god had to be stronger.