Final answer:
The two German cities that hosted peace talks were Münster and Osnabrück during the 17th-century Peace of Westphalia, aimed at ending the Thirty Years' War.
Step-by-step explanation:
The two Westphalian cities that hosted peace talks between the two sides of the conflict are Münster and Osnabrück. These talks, known as the Peace of Westphalia, took place in the mid-17th century, from 1644 to 1648. The peace negotiations aimed to end the Thirty Years' War, a devastating conflict primarily fought within the boundaries of the Holy Roman Empire.
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