Caesarsboom (Dutch: Caesar's Tree) is a very old tree whose precise age is unknown but is believed to be over 2000 years in age[dubious – discuss]. The ancient tree grows in Lo, a town in Lo-Reninge, a municipality of the West Flanders region of Belgium. Its species is Taxus baccata, common name European Yew. The tree is designated a national monument of Belgium.
According to a long-held local legend, Julius Caesar stopped at this tree during his military campaign in the area en route to Britannia in 55 BC, tied his horse to it, and took a nap in the shadow of its foliage. According to one source, although the road passing by the tree might date from the era of Imperial Rome, it is not likely that Julius Caesar came to this area.