“Symphony No. 7 “Leningrad”, the seventh of the fifteen Shostakovich composed throughout his life (1906-1975), was premiered on 5th March 1942 at Samara (then named Kuibyshev), performed by the Bolshoi Theatre Orchestra under conductor Samuil Samossud. The success of the premiere and the touching response of the Russian public were the impetus that immediately catapulted this symphony as one of the world’s most popular symphonic works ever, a popularity without precedents in 20th century contemporary music, which led to the most complimentary dithyrambs and the most hard-hitting critiques. Neither praises nor published reviews are the best guide to understand this work, but listening to it and, if need be, its musical and musicological analysis, as follows from the interpretation of conductor George Pehlivanian proposes in this phonographic version with the Spanish National Youth Orchestra. After the premiere in Leningrad, in oppressive conditions, both because of the situation of the city, under permanent siege by direct order of Hitler himself, and the lack of qualified musicians, the symphony was played in Moscow that very same month of March and the success was internationally amplified by the effect of radio broadcasting. The interest shown by most prestigious conductors and most famous orchestras in the world gave the symphony a hitherto unknown diffusion. Toscanini premiered it in New York on 19th July 1942 and immediately after Stokovski, Mitropoulos, Ormandy, Kussewizki, Pierre Monteux and many others in the United States did the same with their own orchestras, a fact that later on, after the end of the war, stimulated its performance in the seasons of the most important European capitals. But Shostakovich, who had been awarded the State Stalin Prize in 1942 for this symphony, dreamed of its premiere in the city of his love, which he achieved on 9th August that year, when German air force bombs thundered over Leningrad. No doubt we are in front of a work that, despite the difficulties it had to overcome to be premiered and the previous opinions of some colleagues inside and outside the Soviet Union, it has surpassed any prediction on popularity and recognition, and it is considered as one of the most performed symphonies all over the world nowadays. Time and countless recorded documents by most eminent conductors and orchestras, to which today joins the Spanish National Youth Orchestra conducted by George Pehlivanian, have nuanced previous judgements, sometimes malicious, and Symphony No. 7 named “Leningrad” by Dimitri Shostakovich has become part of an indisputable legacy that only individual listening will endorse its value, not only as a document of a historical event, but also as a musical document that endures as “historical reason”. It is not descriptive music, but instrumental music where the allegorical and the psychological express musically.