La pietra del paragone La pietra del paragone La pietra del paragone (The Touchstone) is an opera, or melodramma giocoso, in two acts by Gioachino Rossini, to an original Italian libretto by Luigi Romanelli. "La pietra del paragone" was first performed at La Scala, Milan, on 26 September 1812. It was the composer's first commission from a major opera house and was an instant success, being performed 53 times during its first season. Napoleon's Viceroy in Milan, Eugène de Beauharnais, was so impressed by the opera that he wrote to the Minister of the Interior, "You will kindly arrange for Maestro Joachin Rossini to
La Scala citing "hostility" from staff members. In May 2005, Stéphane Lissner, formerly head of the Aix-en-Provence Festival, was appointed General Manager and Artistic Director of La Scala, becoming the first non-Italian in its history to hold the office. On 15 May 2006, Daniel Barenboim was named "Maestro Scaligero", or "de facto" principal guest conductor, of the company. In October 2011, Barenboim was appointed the next music director of La Scala, effective December 2011, with an initial contract of 5 years. In December 2013, management named Riccardo Chailly the next music director of La Scala, effective 1 January 2015. Stéphane Lissner left