Boston's Handel & Haydn Society (colloquially H&H) has been fundamental to the development of classical music in the U.S. since its founding in 1815. It has been continuously operating longer than any other performing arts organization in the country. The group was organized by a committee of prosperous Boston businessmen, whose professional contingent gradually expanded; many of the first members were tradespeople who were members of local church choirs. As the name implies, the group is devoted to performances of 18th century music, but it also performs large chorus-and-orch...