A Chinese Buddha statue that dates from approximately the 11th or 12th century was found to have a mummified monk inside of it as well as even older pieces of rolled textile carpet, covered in Chinese text. (Story from LiveScience.com)
The Buddha statue itself is made of gold-plated papier-mâché and, according to the carbon dating performed on it, was created around the eleventh or twelfth century. The monk inside of the statue may have performed self-mummification, wherein he slowly starved himself to death in a way that would promote mummification and reduce decay. His body was then placed in a lotus position inside of the statue.
It’s interesting that we think of this as a mummified monk who was surprisingly found inside of a Buddha statue, rather than viewing the statue itself as a part of the mummification. Here is the CT scan of the mummy:
Given that the Buddha statue seems to have so precisely matched the contours of the monk’s remains, it appears to be an artistic, elaborate coffin, rather than a statue that just happens to have a corpse hidden inside of it. (Just bear in mind that my study of the classics was limited to Greece, Rome, and a smidge of Egypt, and ended sometime around 400 AD.)