The Vienna Boys' Choir, Wiener Sängerknaben, is one of the oldest boys' choirs that is not part of a church or college. In the late 15th century the choir was part of Maximilian I's court music and sang in the Imperial Chapel which he founded, but the roots of the choir go back as far as the 13th century. The choir still sings in the Imperial Chapel in Vienna on Sundays, but the boys also tour a lot. The choir has its own grammar school to ensure that its members maintain their schooling.
The choir is organized into four touring choirs named after famous Austrian composers associated with the history of the choir: Bruckner, Haydn, Mozart and Schubert. The Vienna Boys' Choir is a private, not-for-profit organization and is housed at the Hofburg.
The closest metro station to the Hofburg (Imperial Palace) is Herrengasse on line U3. Or tram 1, 2, D and J, get off at stop Burgring. Buses 2A and 3A stop at Hofburg.