World Without End is a concert featuring the Chestnut Street Singers and organist Michael Smith. Repertoire includes anthems from the golden era of the English choral/organ tradition, loosely following the structure of an Anglican evensong service and centered by Herbert Howells’ groundbreaking Collegium Regale setting. A contemplative atmosphere in which historical Anglican Church music is cast in conversation with contemporary settings and thought. Friday’s concert is downtown at S. Clement’s Church.