Semi-Autonomous: Memory eternal[a] is an exclamation, an encomium like the polychronion, used at the end of a Byzantine Rite funeral or memorial service, as followed by the Eastern Orthodox and Eastern Catholic Churches.
It is the liturgical counterpart to the Western Rite prayer "Eternal Rest."
[citation needed] "Memory eternal" is not chanted for those who have been officially glorified (canonized) as saints.
"[2] "Memory Eternal" is chanted at the end of services on Saturdays of the Dead, though not for an individual, but for all of the faithful departed.
[3] In the Russian Orthodox Church, "memory Eternal" is chanted on the Sunday of Orthodoxy for all of the departed rulers of Russia.