La bohème (French pronunciation: ​[la bɔ.ɛm], Italian: [la boˈɛm]) is an opera in four acts, composed by Giacomo Puccini to an Italian libretto by Luigi Illica and Giuseppe Giacosa, based on Scènes de la vie de bohème by Henri Murger. The world premiere performance of La bohème was in Turin on 1 February 1896 at the Teatro Regio, conducted by the young Arturo Toscanini; its U.S. premiere took place the next year, 1897, in Los Angeles. Since then, La bohème has become part of the standard Italian opera repertory and is one of the most frequently performed operas worldwide.