Zeus, Heras, Poseidon, Hades, Demeter, Hephaestus, Athene, Aphrodite,...

[Justin]

...Ares, Apollo, Artemis, Hermis, Dionysus? Ok those are 13 gods of Ancient Greek, which one of those was not in the olympians? Since there was only 12 gods...

 

[nileprincess]

i think it's Hades. he ruled the underworld

 

[Clay]

Hades never visited Olympus much, so I'd assume he didn't have a throne there.

 

[Lalex]

These are listed as the 12 Olympians:
Zeus
Poseidon
Hades
Hestia
Hera
Ares
Athena
Apollo
Aphrodite
Hermes
Artemis
Hephaestus
So, it appears that Demeter and Dionysus are not part of the big twelve and you left out Hestia, who is.

Note: People! Hades, Poseidon, and Zeus were brothers. He was certainly one of the big twelve whether or not he chose to associate with them.

 

[kaygirl]

i was pretty sure it was hestia, because apparently everybody else was important.