The Christmas tree is often explained as a Christianization of the ancient pagan idea that the evergreen tree represents a celebration of the renewal of life. In Roman mosaics from what is today Tunisia, showing the mythic triumphant return from India of the Greek god of wine and male fertility, Dionysus (dubbed by some modern scholars as a life-death-rebirth deity), the god carries a tapering coniferous tree. Medieval legends, nevertheless, tended to concentrate more on the miraculous "flowering" of trees at Christmastime. A branch of flowering Glastonbury thorn is still sent annually for the Queen's Christmas table in the United Kingdom.
Taiwanese aboriginals, tutored by Christian missionaries, celebrate with trees (Cunninghamia lanceolata) outside their homes.Among early Germanic tribes the Yule tradition was celebrated by sacrificing male animals, and slaves, by suspending them on the branches of trees. According to Adam of Bremen, in Scandinavia the pagan kings sacrificed nine males of each species at the sacred groves every ninth year. According to one legend, Saint Boniface attempted to introduce the idea of trinity to the pagan tribes using the cone-shaped evergreen trees because of their triangular appearance