The Olympian gods were the main gods of Ancient Greece. After overthrowing their ancestors, the Titans, the Olympian gods became the rulers of the World (Cosmos), representing the civilization of the world. The Olympian gods majestically and democratically dwelled on Mount Olympus, the highest mountain in Greece, built by the Cyclopes. The leader of the Olympian gods was Zeus.
The gods were born and grew just like human beings, some of them even married, however they were unaging and death never came to them. They lived inside human-like bodies with an ethereal fluid called ichor running through the veins. They had passions and human weaknesses and were many times at fault, but were then obliged to take the full responsibility of their actions.
Greek myths always refer to the twelve Gods of Mount Olympus, but actually, in total there were more Olympian Gods in Greek Mythology. However, there were never more than twelve at one time. The four alternative gods were Hestia, Hades, Dionysus and Demeter, depending on the location.