Concert Artists of Baltimore is a combination chamber orchestra and vocal ensemble in Baltimore, Maryland. The group describes itself as being a 30-year-old institution entirely composed of paid professionals. This puts it on a tier above other non-BSO orchestras in Baltimore, such as the Soulful Symphony, Baltimore Choral Arts Society, Baltimore Philharmonia, Baltimore Chamber Orchestra, Peabody Institute ensembles and various academic orchestras. The unique nature of the group allows it to stage large orchestral/choral works at a level of quality only viable in-house for a few other institutions on the East Coast. It also puts the group in demand for collaborations, including a 2011 performance of Honegger's Joan of Arc which, with more than 600 participants, was so massive as to require