Die Meistersinger von Nürnberg (The Mastersingers of Nuremberg) is an opera in three acts, written and composed by Richard Wagner. It is one of the most popular operas in the repertory, and is among the longest still commonly performed today, usually taking around four and a half hours. It was first performed at the Königliches Hof- und National-Theater in Munich, on June 21, 1868. The conductor at the premiere was Hans von Bülow. The story takes place in Nuremberg during the middle of the 16th century. At the time, Nuremberg was an Imperial Free City, and one of the centers of the Renaissance in Northern Europe. The story revolves around the real-life guild of Meistersinger (Master Singers), an association of amateur poets and musicians, mostly from the middle class and often master craftsmen in their main professions. The Mastersingers developed a craftsmanlike approach to music-making, with an intricate system of rules for composing and performing songs. The work draws much ofits charm from its faithful depiction of the Nuremberg of the era and the traditions of the Mastersinger guild.