It is thought that the iconography sometimes has ritual and religious associations; for example, the Lion Gate of Mycenae has a column between the protective, surmounted and confronted lionesses standing with two feet on the ground and two on the same base on which the column rests. The column is thought to represent a goddess, abstracted to avoid tabooed direct representation. Alternatively, the column has also been interpreted as symbolizing the entrance to the palace. The lions are thus guarding the entrance to the palace and the walled fortification simultaneously. The motif called the Tree of Life, where two confronted animals graze on a shrub or tree, is also very ancient.