Education
Sonnleithner studied legal science at the University of Vienna where he graduated with a doctorate.
Sonnleithner studied legal science at the University of Vienna where he graduated with a doctorate.
He was the father of Ignaz von Sonnleithner and Joseph Sonnleithner. Later he was given work as a solicitor in the service of the princely House of Esterházy being his employer Prince Paul II Anton Esterházy de Galantha. Sonnleithner was appointed as Dean of the Juridical Faculty at the University of Vienna, and had thus the office of the court judge of the Scottish Abbey, the College of the Scots.
As a composer, Sonnleithner was in contact with Joseph Haydn.
He composed 36 string quartets, all dedicated to Joseph II, Holy Roman Emperor, several symphonies and various church music