Once upon a time, Athens was a very new city which was built and it was also yet unnamed. Goddess Athena and God Poseidon were rival about to be patron deity of Athens. Then, they aggreed to give one gift for Athenians and also Athenians would choose the gift they preferred. Next, Poseidon struck his the ground his trident caused a spring water. However, the citizens and gods did not like this water because it was salty. Afterthat, Athena came there who planted a seed in the ground, which grew up became lovely olive tree. Jury and citizens liked olive tree so the patron of deity was Athena.