Mykola Dmytrovych Leontovych was a Ukrainian composer, choral conductor and teacher active in the early 20th century, best known for his arrangements of folk songs and sacred choral music within the Eastern European choral tradition; his work is characterized by close four-part harmonies, modal melodies drawn from Ukrainian folk sources, and an emphasis on a cappella vocal texture. Gerald Wirth is an Austrian conductor, composer and cultural manager associated with classical and choral music from the late 20th century onward; he has worked in institutional leadership and is known for repertoire spanning sacred and secular choral works and for fostering vocal ensemble performance practice.