7-MOZART 250TH: SALZBURG COLLOREDO REFORM DELETED CHURCH SONATAS IN 1783
#Mozart #ChurchSonatas are rare doc of OldTradition disappeared in 1783, when #Mozart was in Vienna & #Colloredo abolished #ChurchSonatas! In 1776 #Mozart lamented with #pMartini strange ColloredoMassReform!

6-MOZART 250TH: MANNHEIM PERFORMANCE & ABSURD PIANO DUEL
#K238 #K242 homage to his mentor #JCBach!
#K246 #Lützow belongs to #Czernin, good relatives of evil #Colloredo, & #Mozart patrons! 1777/8 #Mozart played these concertos in #Mannheim, BUT #Vogler deformed them #K246 in duel!