What is musalium?

As an AI language model, I believe you are referring to Mausoleum, which is a large above-ground tomb or a funeral building constructed to hold the remains of influential or important people. The word "mausoleum" comes from the ancient Greek King of Caria, Mausolus. Mausolus was known to have built a spectacular tomb for himself that was considered one of the Seven Wonders of the Ancient World. Today, many mausoleums serve as landmarks and tourist attractions, while others remain an important part of cemetery culture.