Celebrated: Pascha

Photo: Wikimedia Commons / Public Domain
The icon of Pascha in Orthodox tradition is not the Western image of Christ emerging from the tomb, but the Anastasis — Christ descending into Hades, breaking its gates, and pulling Adam and Eve out of their graves. It is the most triumphant image in all of Christian art.
Broken Gates: The gates and locks of Hades lie shattered beneath Christ's feet, depicting his conquest of death.
Adam and Eve: Christ pulls the first humans from their tombs, symbolizing the salvation of all humanity from the beginning of time.
The Dark Abyss: The black void below represents Hades — not a place of punishment but the realm of death from which Christ frees the righteous.