La Scala, Milan is, for most opera lovers, the world’s most revered and important opera house. The theatre opened in 1778 with a performance of an opera by Salieri and since then many of the greatest Italian operas have received their first performance on its hallowed stage. Two very different divas enjoyed their greatest successes at La Scala – Renata Tebaldi and Maria Callas triumphed here season after season at the height of their careers.