By Kevin Lavery, KWMU
St. Louis, MO – 
The Vienna Choir Boys is one of the oldest and most famous musical institutions in the world. Its roots go back to 1498, when it was founded by Emperor Maximilian I. On November 21, the choir gave a concert at the Cathedral Basilica of St. Louis. KWMU's Kevin Lavery caught up with the choir halfway through its North American tour.