For the ancient Celts, certain trees, especially oak, ash, and hawthorn, had special significance as a source of fuel, building materials, ornaments, and weapons.
Trees were often regarded as oracles. In Greek mythology, driads (tree nymphs) inhabited trees.
West Africans from the Ubangi River region plant a tree when a child is born. When the tree blooms, it's time for marriage. Gifts are left on the tree, and it is believed that a person's spirit lives on in the tree after death.