Boniface literally struck a blow for Christianity in his attempt to destroy pagan superstitions. On a day previously announced, in the presense of a tense crowd, he attacked with an ax Donar's sacred oak on Mount Gudenburg. The huge tree crashed, splitting into four parts. The people waited for the gods to strike Boniface dead—then realized their gods were powerless, nonexistent. He used planks from the tree to build a chapel.