Star Wars Hieroglyphs
This easter egg appears in all versions of the movie.
In Raiders of the Lost Ark, when Indiana Jones and Sallah are preparing to remove the stone lid off the sarcophagus of the ark, we see a wall of hieroglyphics behind them with many figures resembling people.
If you look closely you’ll notice one of these is actually a rough depiction of Princess Leia inserting the Death Star Plans into R2-D2 with C-3PO approaching from the right. As the picture can be hard to see, we’ve also included a clearer one of unknown origin below.