In 1804, Beethoven got the news that Napoleon, hero of the French Revolution, had declared himself emperor. Seething over the betrayal, Beethoven tore off the title page of his new symphony rather than debase his music by dedicating it to a traitor. Thus we have the “Eroica” Symphony, for heroes in general, instead of the “Bonaparte” Symphony. No pages will be torn during Monday’s performance of the “Eroica” in its chamber music version. But you’ll get to hear one of the pivotal works that ushered in the romantic era in Western music. In one way or another, each of the pieces in the six concerts that make up “Revolutionary and Banned” — a festival presented by the Chamber Music Society of Central Virginia — represented a new way of looking at music or at the world when it was composed. The festival runs May 16-22 at various locations, including the Richmond Main Public Library, Bon Air Presbyterian Church and Wilton house. $5-$35. cmscva.org.