accompanied by economic expansion and repopulation (Schwabenzug), as Austria entered the period of High Baroque with a profusion of new buildings, including the Belvedere (1712–1783) and Karlskirche (1716–1737), exemplified by the great architects of the period, such as Fischer, Hildebrandt and Prandtauer. However the Habsburgs' finances were fragile. They had relied on Jewish bankers such as Samuel Oppenheimer to finance their wars, and subsequently bankrupted him. However the financial system in Austria remained antiquated and inadequate. By the time of Charles' death in 1740 the treasury was almost depleted. Religious intolerance in Austria, once unquestioned in the Erblande and the neighbouring catholic territories became the subject of more intense scrutiny by 1731 when 22,000 suspected crypto-Protestants were expelled from Salzburg and the Salzkammergut by the Prince-Archbishop of Salzburg. Similar intolerance was displayed to the Jewish population in Bohemia and surrounding areas under the Familianten (Familiantengesetze) in 1726 and 1727. Worse would have followed had there not also been a realisation that there were economic consequences and that some accommodation was required to the more rationalist ideas of western Europe. Among these was cameralism which encouraged economic self-sufficiency in the nation state. Thus domestic industries such as the Linzer Wollzeugfabrik were founded and encouraged, but often such ideas were subjugated by vested interests such as aristocracy and church. Rationalist emphasis on the natural and popular were the antithesis of Habsburg elitism and divine authority. Eventually external powers forced rationalism on Austria. By the time of his death in 1740, Charles III had secured the acceptance of the Pragmatic Sanction by most of the European powers. The remaining question was whether it was realistic in the complicated power games of European dynasties. Maria Theresa and reform (1740–1780) Charles III died on 20 October 1740, and was succeeded by his daughter Maria Theresa. However she did not become Empress immediately, that title passing to Charles VII (1742–1745) the only moment in which the imperial crown passed outside of the Habsburg line from 1440 to 1806, Charles VII being one of many who repudiated the 1713 Pragmatic Sanction. As many had anticipated all those assurances from the other powers proved of little worth to Maria Theresa. War of Austrian Succession (1740–1748) On 16 December 1740 Prussian troops invaded Silesia under King Frederick the Great. This was the first of three Silesian Wars fought between Austria and Prussia in this period (1740–1742, 1744–1745 and 1756–1763).