Each sarcophagus contains a mummy. According to the researchers, mummies of important people are buried in these coffins. The deceased human body was placed in the fetal position, then wrapped in a cocoon with a wild cane stalk and tied with rope. This structure is further covered with clay and thick straw as the binder. The reason or purpose of this creepy ornament remains a mystery. These clay pieces have been around for over 600 years. Burial of the dead in humanoid caskets and on the cliffs has been widely practiced by the Chachapoya people for centuries, throughout their history. Carefully placed in a nearly inaccessible position halfway up the cliff, these Purunmachos sarcophagi managed to escape the destruction of the invaders.