Tympana

In Khmer temple architecture, the kala serves as a common decorative element on lintels, tympana and walls, where it is depicted as a monstrous head with a large upper jaw lined by large carnivorous teeth, but with no lower jaw.

Most of the missing images were located in the building's two tympana.

The wheels, or tympana, were solid and were several centimetres (inches) thick.

Until about the 11th century AD, the Angkorian Khmer confined their narrative bas-reliefs to the space on the tympana above doorways.