On 11 March 1530, Elector John received the summons issued by Charles V on 21 January to attend the Diet of Augsburg, which was to begin on 8 April. After nine years’ absence from the empire, the emperor was once again going to participate personally in a diet—for the first time since Worms. This time he had his hands free to deal with matters in the empire. Spain was quiet, peace had been concluded with France, and the imperial hegemony
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