Boys have been singing at Vienna's Imperial Chapel since 1296 and were part of the Viennese Court musicians that included Mozart, Salieri and Bruckner. Joseph Haydn, Michael Haydn, and Franz Schubert were themselves choristers. Today, touring is part of the choristers’ education. Since 1926 the Vienna Boys Choir has undertaken around 1000 tours in 97 different countries; in that time, the boys have sung more than 27,000 concerts. The quintessential boys’ choir currently consists of 100 choristers between the ages of nine and fourteen, divided into four touring choirs. They give around 300 concerts each year, attended by almost half a million spectators around the world.