Reinhard Keiser, a titan of the German Baroque era, was a prolific opera composer based in the vibrant city of Hamburg. With over a hundred operas to his credit, Keiser's works were once celebrated alongside those of Johann Kuhnau, George Frideric Handel, and Georg Philipp Telemann. His compositions, such as the stirring "Passion Oratorio According to St. Mark," showcase his profound stylistic depth and have earned him a place among the most important composers of his time. Despite a period of obscurity, Keiser's music is experiencing a resurgence, inviting audiences to rediscover the rich tapestry of his sacred and operatic works. His dramatic flair and musical ingenuity make his compositions a must-explore for any enthusiast of Baroque music.