The oak tree, which is the national tree of many countries, primarily symbolizes strength and endurance. Other qualities associated with the oak tree include protection, success and stability.
In addition to representing qualities related to power and durability, the oak tree was considered a bearer of good luck, fertility, potency, healing and health by the Druids. Revered by the Druids, it was distinguished as one of three types of sacred trees. The longevity and size of the oak tree was appreciated in addition to the mistletoe and acorns that it produces.
The oak tree is prominent in religious texts and other mythologies. It is mentioned in ancient mythology, and in Celtic, Norse and Greek writings. Ancient kings wore crowns made from oak leaves to symbolize or represent Greek gods. Oak leaf crowns were also given to Roman commanders during victory parades.
The United States, France, Germany, England, Poland and a number of other countries selected the oak tree as their national tree. Specific types of oaks are also state trees, such as the live oak, white oak and northern red oak tree. Furthermore, images of an oak tree are depicted in various national emblems, military emblems, political party symbols and organizational logos.