An accurate count is impossible, as Bartek's interior has hollowed with age.
There are several older trees in Poland, both oaks and yews (some over 1000 years old), yet none of them have matched Bartek's fame.
The 33.5-metre[2] tall Bartek measures 970 cm[3] at CBH (circumference at breast height) and 13.5 metres in girth at its base.
[4] He reputedly hid a Turkish sabre, an arquebus and a bottle of wine inside it to commemorate the victory.
The limestone was removed in the 1960s, replaced with resin-based filling and covered with bark.