Answer the following question, with explanation first.
Context: The Eurovision Song Contest 1956 was the first edition of the annual Eurovision Song Contest, held at the Teatro Kursaal in Lugano, Switzerland on Thursday 24 May.\n\nQuestion: when was the first eurovision song contest held?

1956
To answer this question, we should know that: The Eurovision Song Contest 1956 was the first edition of the annual Eurovision Song Contest, held at the Teatro Kursaal in Lugano, Switzerland on Thursday 24 May.

.

Final answer: 1956