The oak measures 2.38 m in diameter and 7.46 m in girth at waist level and reaches 23.4 m in height, but only eastern side branches remain alive. In March 1982 samples were taken with a pressler drill, from which it was estimated that the tree was 1637 years old. With an estimated germination date of 345 AD, it is the oldest tree in Bulgaria and one of the oldest in Europe.
- Register of Centuries Old Trees, Bulgarian Ministry of Environment and Waters
- Vanyo Stoilov, The Oldest Tree in Europe is Slowly Dying, 24 Chassa Daily, 20 November 2011. (In Bulgarian)