Why are there often ancient ginkgoes in ancient temples?
Buddhism has a subtle relationship with flowers and trees. According to the legend, Lord Buddha was born under the tree of no worries, became a Buddha under the Bodhi tree, and died under the double holy tree, so these three trees became sacred to Buddhism in a sacred manner. It is said that the Ginkgo tree is associated with Buddhism as a stand-in for the Bodhi tree.
