Like the egyptians the kings of what were burieed with their personal belongings including valuable gems gold jewlery and pottery

Viking kings would bury their riches and belongings along with a soul to protect it. They also would be buried in their boats, the boat always filled with their belongings. As well as Chinese emperors. Having grave goods was a custom in china from the neolithic period (About 5,000 BC) to the Ming Dynasty (1644). And according to the Boxer Codex, the indigenous people of the Philippines practiced ship burials.