Established in 57 BCE, the ancient Korean kingdom of Silla lasted for more than a millennium. The nearly impenetrable royal Sillan tombs—located near the modern South Korean city of Gyeongju—have yielded lavish treasures. Among them are a number of fragile, solid gold crowns, crafted with an intricate tree branch motif. Because they are so delicate, they were probably used only for formal occasions or burials. Why did the Sillan practice of opulent burials end by the end of the 6th century? Discuss