Original sentence: A number of conductors have appeared there, too.Every year over 500,000 people see productions of the popular operas in this arena.In 1913, operatic performances in the arena commenced in earnest due to the zeal and initiative of the Italian opera tenor Giovanni Zenatello and the impresario Ottone Rovato.In the post-World War Two era, they have included Giuseppe Di Stefano, Maria Callas, Tito Gobbi and Renata Tebaldi among other names.Since then, summer seasons of opera have been mounted continually at the arena, except in 1915–18 and 1940–45, when Europe was convulsed in war.The first 20th-century operatic production at the arena, a staging of Giuseppe Verdi's Aida, took place on 10 August of that year, to mark the birth of Verdi 100 years before in 1813.The round façade of the building was originally composed of white and pink limestone from Valpolicella, but after a major earthquake in 1117, which almost completely destroyed the structure's outer ring, except for the so-called "ala", the stone was quarried for re-use in other buildings
Edited sentence: A number of famous conductors have appeared there, too.Every year over 500,000 people see spectacular productions of the popular operas in this arena.In 1913, operatic performances in the arena commenced in earnest due to the zeal and initiative of the great Italian opera tenor Giovanni Zenatello and the impresario Ottone Rovato.In the post-World War Two era, they have included Giuseppe Di Stefano, Maria Callas, Tito Gobbi and Renata Tebaldi among other celebrated names.Since then, summer seasons of opera have been mounted continually at the arena, except in 1915-18 and 1940–45, when Europe was convulsed in war.The first 20th-century operatic production at the arena, a staging of Giuseppe Verdi's Aida, took place on 10 August of that year, to mark the birth of Verdi a 100 years before in 1813.The round façade of the building was originally composed of white and pink limestone from Valpolicella; but after a major earthquake in 1117, which almost completely destroyed the structure's outer ring, except for the so-called "ala", the stone was quarried for re-use in other buildings