🌲 Introduction Long before locks guarded doors or symbols were written on paper, protection was carved directly into wood. Across the Celtic and Norse worlds, people believed certain trees carried quiet power — not through force, but through presence. Among these, none was more respected than the rowan tree. Small and often overlooked, the rowan grew along boundaries: at forest edges, beside pathways, and near homes. To ancient communities, this was no coincidence. The rowan