La Scala Confirms Chailly Will Be Principal Conductor and Music Director After months of speculation the Teatro alla Scala in Milan confirmed on Tuesday that Riccardo Chailly, the Milanese conductor, would become the opera house's principal conductor in 2015 before becoming its music director in 2017. As music director Mr. Chailly will replace Daniel Barenboim, who is leaving at the end of 2014, two years before his contract was set to expire. A La Scala spokesman said no one would have the title of music director in the interim between Mr. Barenboim's departure and Mr. Chailly's assumption of the post. La Scala has been undergoing leadership changes. On Saturday the departing general manager, Stéphane Lissner, oversaw the gala opening of the season, a production of "La Traviata." He is expected to leave this summer to take over the Paris Opera, replaced as general manager by Alexander Pereira, who had chosen Mr. Chailly. The opera house said that in 2015 and 2016 Mr. Chailly would conduct three operas and two concert cycles, and between 2017 and 2022 he would conduct at least two operas per season and two cycles of three concerts in the theater's symphony season. Mr. Pereira and Mr. Chailly are expected to hold a news conference on Monday, where they will offer their first public comments on the transition.