Modern science has validated a 300-year-old Joseon Dynasty record, helping researchers pinpoint the mountain quarry that supplied the stone for King Danjong’s royal tomb — the final resting place of the young monarch who was exiled and forced to drink poison by his usurping uncle, a tragic tale brought to the big screen in the 2026 film, "The King’s Warden." Now, centuries after the young king’s death, a forensic blend of historical archives, field surveys and modern geological analysis has solved a long-standing mystery. The National Research Institute of Cultural Heritage confirmed Wednesday that the granite used to build King Danjong’s royal tomb was quarried from Mount Songhak in Jecheon, North Chungcheong Province — tracing the very stones of the monument back to their ancient source. Danjong, the sixth monarch of the Joseon Dynasty, was deposed by his uncle in 1455 and exiled to Yeongwol, Gangwon Province, where he was forced to drink poison two years later at the age of 16. Threatening severe punishment for anyone who touched the body of the exiled former king, his v