Adagio in G minor, by Tomaso Albinoni and

From Wikipedia:

The Adagio in G minor for violin, strings and organ continuo, is a neo-Baroque composition popularly attributed to the 18th-century Venetian master Tomaso Albinoni, but composed by the 20th-century musicologist and Albinoni biographer Remo Giazotto and based on the purported discovery of a manuscript fragment from Albinoni.