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Why was Silesia important to Prussia and Austria?

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Seven Years' War: Battle of Zorndorf — Seven Years’ War Frederick II leading his Prussian troops against Russians at the Battle of Zorndorf during the Seven Years' War, August 25, 1758.

Silesia was a central point of contention between Prussia and Austria due to its immense economic value and strategic significance. By the 18th century, Silesia’s flourishing mining and textile industries had made it the wealthiest of all the Habsburg provinces.2

For Prussia, the acquisition of Silesia was a transformative move that elevated the state to a major European power. Frederick II (the Great) was motivated by the region's wealth and the desire to secure territory based on weak dynastic claims held by the Hohenzollern family. Once under Prussian control, the region’s economic development—including expanded coal, iron-ore, lead, and zinc mining—further solidified its importance to the Prussian state.12

For Austria, the loss of such a prosperous province was a significant blow. Empress Maria Theresa remained tenaciously committed to recovering Silesia throughout her reign, a goal that served as a primary driver for the Seven Years’ War.34