Imperial Diet of the Holy Roman Empire

Timeline

1. 1400–1521Holy Roman Empire · Holy Roman EmpireThe Diet deliberated by estates in the College of Electors, College of Princes, and College of Cities; the emperor and imperial regents convened meetings, binding member states through resolutions, edicts, and alliance treaties, forming a key link in the empire's composite sovereignty structure.
2. 1521Worms · RhinelandThe 1521 Imperial Diet at Worms tried Martin Luther's case, declaring him an outlaw by imperial edict, making the Imperial Diet the primary imperial mechanism for handling evangelical heresy questions.
3. 1529–1530Speyer-Augsburg · Holy Roman EmpireAt the 1529 Diet of Speyer evangelical princes lodged a protest, and the 1530 Diet of Augsburg saw a confessional confrontation over the Augsburg Confession and the Catholic Confutation, pushing the Imperial Diet institution to the forefront of religious division.