Johann Adolph Hasse (March 25, 1699 - December 23, 1783) was a German Classical composer. Hasse was born at Bergedorf near Hamburg and received his first musical education from his father. Being possessed of a fine tenor voice, he chose a theatrical career and joined the operatic troupe conducted by Reinhard Keiser, in whose orchestra Handel had played the second violin some years before. Hasse's success led to an engagement at the court theatre of Brunswick-Lüneburg, and it was there that, in 1723, he made his debut as a composer with the opera Antigonus.

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