Zeus

Zeus was King of the Greek gods. The Romans conflated Zeus with their own King of the gods Jupiter.

Zeus in Thessalonica
After several centuries of Christianity as the dominant religion of Greece, Zeus apparently ceased to exist for want of worshipers.

Zeus in After the Downfall
In 1893 Herr Doctor Professor Maximilian Eugen von Heydekampf took the Omphalos from Zeus' temple in Delphi and brought it back to Berlin.

Zeus in "The Daimon"
Zeus was called upon by many Greeks during their prayers. Even Alkibiades, who generally disdained worship, readily swore by Zeus when it suited his purposes.