The Adagio in G Minor for Organ and Strings has been popularly attributed to Tomaso Albinoni (1671-1751), a Venetian baroque composer who wrote at least 81 operas as well as many instrumental works. Nine collections of his works were published during his lifetime, and his works were favorably compared to his contemporaries Vivaldi and Corelli.
This hauntingly beautiful piece of music has been in the soundtrack of at least 20 movies (including Dragonslayer, Rollerball, Flashdance and Gallipoli), many popular TV shows, and throughout the years has been rendered by at least 10 modern pop and rock groups.
Unfortunately, much of his music was lost during the bombing of Dresden in 1945. Since then many musicologists have had to reconstruct his lost music from fragments of it found in Dresden archives.
Musicologist, music critic and composer Remo Giazotto was trying to systematically catalogue Albinoni's works, and asked the Saxon State Library of Dresden to send him the scraps of what was left of Albonini's “Trio Sonata”.
From only the bassline found in the slow part of the trio and a few fragments of melody, Giazotto magically constructed the Adagio. He published it in 1958, attributing it to Albinoni.
Later, in 1965, he claimed full credit for the work. Today there is still controversy on who to give credit to. I certainly think that Giazotto deserves at least partial credit, if not full, since he had so little to work with. Ironically, this is the piece that Albinoni is most famous for.