What was the original purpose of the building known as the Mosque-Cathedral?

What was the original purpose of the building known as the Mosque-Cathedral?

Jewish synagogue
Christian church
Mosque

Fact: The Mosque-Cathedral of Córdoba originally began as a church built by the Visigoths, but it was transformed into a mosque by Abd al-Rahman I in 784 CE, marking its primary function during that era.

Correct Answer: Mosque