His Vienna colleague, Georg Christian Wagenseil,[35] we may dismiss with a few words, for, though one of the most fashionable composers of his time, his compositions have hardly any historic interest--they lack real individuality. But he was in the line of development under the Mannheim influence, and he did for the piano concerto what Schobert did for the sonata--applied to it the newly crystallized sonata form. His concertos were much in vogue; little Mozart had them in his prodigy’s repertoire--and no doubt they left at least a trace of their influence on his wonderfully absorbent mind. Wagenseil enjoyed a favored existence at court as teacher of the Empress Maria Theresa and the imperial princesses, with the rank of imperial court composer. The Latin titles on his publications seem to reflect his somewhat pompous personality. Pieces in various forms for keyboard predominate, but the usual quota of string music, church music, and some symphonies are in evidence. His sixteen operas are a mere trifle in comparison with the productivity of the period. * * * * * Before closing our review of the minor men of the period which had its climax in the practically simultaneous appearance of Haydn and Mozart, we must take at least passing notice of two men, the brother of one and the father of the other, who, by virtue of this close connection, could not fail to exercise a very direct influence upon their greater relatives. By a peculiar coincidence these two had one identical scene of action--the archiepiscopal court of Salzburg, that Alpine fastness hemmed in by the mountains of Tyrol, Styria, and Bohemia. Hither Leopold Mozart had come from Augsburg, where he was born in 1719, to study law at the university; but he soon entered the employ of the Count of Thurn, canon of the cathedral, as secretary, and subsequently that of the prince archbishop as court musician, and here he ended his days at the same court but under another master of a far different sort. Johann Michael Haydn became his confrère, or rather his superior, in 1762, having secured the place of archiepiscopal _kapellmeister_, left vacant by the death of the venerable Eberlin. Before this he had held a similar but less important post at Grosswardein (Hungary) as predecessor to Ditters, and, like his slightly older brother Joseph, had begun his career as chorister in St. Stephen’s in Vienna.