"Magical" Irish towers

In an article on his blog, writer Philip Coppens discusses the "mysterious round Irish towers," an Irish medieval architectural phenomenon. The article is entitled Round towers: needles in magical landscape?

Many theories about the purpose of the towers have been proposed including "fire towers, belfries, watch towers, granaries, sepulchres, forts, hermit dwellings, purgatorial pillars, phallic symbols, astronomical marks, depositories of Buddhist relics, Freemason lodges, etc.," but the truth is no one is certain about the use of the structures.