Europe

The Bosnian pine (Pinus heldreichii) was dated by counting the rings, which are formed each year as the tree grows.

Paul J Krusic, the leader of the expedition that found the tree, described the its survival as "remarkable". Around the time that this tree was a seedling, in the year 941, the Vikings were roaming northern Europe. And it was already about 250 years old when the University of Oxford was founded.

THE greatest collection of ancient oak trees anywhere in Europe has been discovered in Britain after research uncovered them in a Medieval deer park.

At least 60 Middle Age oaks have been unearthed in a survey of the grounds of Blenheim Palace in Oxfordshire, with four of them measuring almost 30 feet in diameter. 

The huge width dates them to the Medieval period - between 960 and 1196AD.