The Medford Public Library welcomes the Cambridge Chamber Singers for “Resonet in Laudibus,” a concert of 500 years of music from the German-speaking world. The program will feature four Renaissance motets; Romantic works by Rheinberger and Bruckner; a sampling of 20th-century pieces by Kerstin Thieme, Hugo Distler and Franz Biebl; and a world premiere by Ray Fahrner. A celebration of Anton Bruckner’s 200th birthday will showcase three of his moving motets, including the stunning Virga Jesse Floruit. Registration is required through the library’s online calendar.