高句麗 (Goguryeo) was an ancient kingdom that existed from 37 BC to 668 AD, located in parts of modern-day North Korea and China. It was one of the Three Kingdoms of Korea, alongside Baekje and Silla. Goguryeo was known for its military strength, cultural achievements, and expansive territory, which at its height included much of northern Korea and parts of Manchuria. The kingdom played a significant role in the history of East Asia, engaging in conflicts with neighboring states and influencing the development of Korean culture. Goguryeo is also famous for its impressive tombs, which feature intricate murals that provide insight into the life and beliefs of its people.