Experts have found what could be Korea's oldest written record on a wooden stick.
The Seoul Baekje Museum say a piece of mokgan, or a wooden stick with writing on it, was found at a fortress in Seoul.
Koreans wrote on wooden sticks before paper and the experts think it could've been written 15-hundred years ago during the Goguryeo Kingdom.
Around ten to thirteen letters are visible, but they haven't figured out the meaning yet as the letters have been heavily weathered.
The Mongchontoseong Fortress is an earthen fortification from the ancient Baekje Kingdom, yet Goguryeo people temporarily lived at the site.