The yearning we feel in the twenty-first century for all things Celtic is nothing new. In the 1700s, people in England became interested once again in the Druids and sought to bring druidry back to life. Later, in the nineteenth century, the poet William Butler Yeats was at the center of what is known as the Celtic Revival, a movement that sought to reaffirm a Gaelic spiritual heritage amid the encroaching British culture.