Europe's Oldest Living Tree, at 1,075 Years
National Geographic (August 21, 2016) 
"Many years ago I read a thesis about this very interesting forest in Greece. In our research, we try to build long chronologies to construct climate histories, so finding living trees of old age is one of our motivations. To age the tree, we needed to take a core of wood, from the outside to the center. The core is one meter and has 1075 annual rings."