<p>The cycle is a work of extraordinary scale. Perhaps the most outstanding facet of the monumental work is its sheer length: a full performance of the cycle takes place over four nights at the opera, with a total playing time of about 15 hours, depending on the conductor's pacing. The first and shortest work, Das Rheingold, typically lasts two and a half hours, while the final and longest, Götterdämmerung, takes up to five hours, excluding inter...