The term Diet of Speyer refers to any of several sessions of the Diet of the Holy Roman Empire when it chose to meet in the city of Speyer, Germany. The most famous sessions occurred in 1526 and 1529.

• The First Diet of Speyer (1526)
• The Second Diet of Speyer (1529)
• The Third Diet of Speyer (1542)
• The Fourth Diet of Speyer (1544)
• The Diet of Speyer (1570)

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