Antonio Lucio Vivaldi, March 4, 1678 – July 28, 1741, nicknamed il Prete Rosso ("The Red Priest"), was a Venetian priest and Baroque music composer, as well as a famous virtuoso violinist; he was born and raised in the Republic of Venice. The Four Seasons, a series of four violin concerti, is his best-known work and a highly popular Baroque piece.

Vivaldi is in the news again today as a long-lost opera by the Italian composer Antonio Vivaldi has been performed for the first time in 278 years, in the city of Prague.

Argippo was written for the Czech capital and premiered there in 1730.

But the opera - a tale of "passion, love and trickery" in an Indian maharaja's court - later disappeared without trace.

Most of the score was discovered in Germany by a young Czech musician who completed the missing parts.

Full BBC Article Here

This is actually not as unique as it may sound as quite recently, four sacred vocal works by Vivaldi have been re-discovered in the Saxon State Library in Dresden. These compositions were improperly attributed to Baldassare Galuppi, a Venetian composer of the early classical period, mostly famous for his choral works.

To read more on Vivaldi please check the following sources:

Vivaldi wiki entry

Michael Talbot: Recent Vivaldi Discoveries

Long-lost Vivaldi opera 'Argippo' returns to Prague after 278 years