What was traditionally painted on the eastern side of a sarcophagus?

The Lower Egyptian coffins, known as "standard class coffins", often had a false door through which the dead can step out to the offering site painted on their interior east walls, with a pair of eyes painted on the outside to enable him to see the activities at the offering site.

Explanation:

"germany's geographic location was an advantage when it was on the offensive in the war because it was situated next to an extremely wide river, the rhine, which was difficult for the allies to cross."