 Complete the following phrase:  The oak tree has had a symbolic value since Ancient times. Some oaks were considered sacred trees by the Gauls. The druids would cut down the mistletoe growing on them. Even after Christianization, oak trees were considered to protect as lightning would fall on them rather than on nearby inhabitation. Such struck trees would often be turned into places of worship, like the Chêne chapelle. King Saint Louis has been represented rendering justice under an oak tree. During the French Revolution, oaks were often planted as trees of Freedom . One of such trees, an oak planted during the 1848 Revolution, survived the destruction of 