Quick Travel Answer
What is the Osireion in Abydos?
The Osireion is a monumental, partly subterranean structure directly behind the Temple of Seti I at Abydos. It is generally understood as part of Seti I’s mortuary complex and is often interpreted as a symbolic royal tomb or cenotaph connected with Osiris, regeneration and sacred kingship. Its sunken plan, massive stone pillars, central platform and water make it visually unlike the decorated temple beside it.
For the main temple, reliefs and Abydos King List, continue to the Abydos Temple guide.

