Hyangnamu or 'Aromatic Tree' in Changdeokgung Palace is estimated to be about 700 years old, meaning it had likely been planted before the palace was built. It stands 12m in x_height, measures 5.9m in girth around the roots, and has branches spreading in all four directions. It is designated and protected as a National Natural Monument.
Source: Korea Tourism Organization official English tourism database. Opening hours and details can change — check the official website before visiting.