La bohème 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 and conducted by the young Arturo Toscanini. Since then, La bohème has become part of the standard Italian opera repertory and is the one of the most frequently performed operas worldwide. In 1946, fifty years after the opera's premiere, Toscanini conducted a performance of it on radio with the NBC Symphony Orchestra. This performance was eventually released on records and on Compact Disc. It is the only recording of a Puccini opera by its original conductor (see Recordings below).