Buddhist missionaries introduced Buddhism to Goguryeo in 372 CE, which then covered the central and southern parts of Manchuria and the northern half of modern-day Korea. As Buddhism infiltrated the culture, Goguryeo kings began commissioning art and architecture dedicated to Buddha. A notable aspect of Goguryeo art are tomb murals that vividly depict everyday aspects of life in the ancient kingdom as well as its culture. UNESCO designated the Complex of Goguryeo Tombs as a World Heritage Site. Goguryeo painting also inspired the creation of similar works in other parts of East Asia, like Japan. This can be seen in the wall murals of Horyu-ji which show its Goguryeo influence. Mural painting also spread to the other two kingdoms. These murals reveal valuable clues about the Goguryeo kingdom including the importance of Buddhism, its architecture, and the clothing commonly worn at the time. These murals were also the very beginnings of Korean landscape paintings and portraiture. However, because the tombs were easily accessed, its treasures were looted leaving very few physical artifacts .