Holy Trinity Church of Cambridge, MA, and the Erevan Choral Society and Orchestra will present an in-person Spring Concert on Sunday, Apr. 24, at 1:30 p.m. in the church sanctuary (145 Brattle St., Cambridge). Founded by Fr. Oshagan Minassian (1930-2008), the Society sings under the baton of Konstantin Petrossian. The concert dedicated to the sainted martyrs of the Armenian Genocide of 1915 will feature vocal and instrumental soloists, and recitations by Armenian School students. Open to the public, admission is free. For information, contact the church office at (617) 354.0632, e-mail office@htaac.org, or click the link to view a flyer.