Some archaeologists think it's where the heart was placed after it was torn from the body.
It is thought to have been a quauhxicalli, in which the hearts of victims of sacrifice were placed.
At least a thousand hearts have been placed there.
Charlotte's heart was embalmed and placed in the parish church of Zhovkva.
A small heart was placed under one wine glass at each table to indicate which guest had been selected to cut the cake.
The heart of the emperor was placed in a precious box put back in his body inside the coffin.
At the beginning of each "round", a heart is placed somewhere on the board.
Once it was a major news event when a heart from one person was placed in the chest of another.
When the second heart was placed in the ionic bath of the first, it also slowed.
But the heart was always placed back in the body because the Egyptians regarded the heart as the key to intelligence rather than the brain.