The Eurovision Song Contest 1956 was the first edition of the annual Eurovision Song Contest, held at the Tealand Theatre in Lugano, Switzerland on Thursday 24 May.

Based on this passage, where was the first eurovision song contest held? Let's give stream of consciousness first:
The relevant sentence in the passage is: The Eurovision Song Contest 1956 was the first edition of the annual Eurovision Song Contest, held at the Tealand Theatre in Lugano, Switzerland on Thursday 24 May.
So, the final answer is the Tealand Theatre in Lugano , Switzerland.