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In page Frederick William I of Prussia:

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His father had successfully acquired the title of king for the Duchy of Prussia for which he had paid the high price of 2 million ducats to Emperor Leopold I, 600,000 ducats to the German clergy and 20,000 thalers to the Jesuit order.[1] In addition, Frederick was obligated to provide Leopold with 8,000 soldiers for the War of the Spanish Succession. To demonstrate his new status, he had the Berlin Palace, Charlottenburg Palace, and Königsberg Castle doubled in size and furnished at considerable expense. However, in doing so, he had largely ruined the state's finances.[citation needed]