Diet of Regensburg (1630)

The Diet of Regensburg was a meeting of the Prince-Electors of the Holy Roman Empire (or Kurfürstentag) which occurred at Regensburg from July to November 1630. It resulted in a major loss of power for the Holy Roman Emperor Ferdinand II.

The Thirty Years' War had prevented any Imperial Diet (German Reichstag) from being summoned for thirty years: the last one before the war had been that of 1613. In 1623, the Emperor had summoned and dominated a Diet of the Princes at Regensburg. The rest of the states' corporate representation had been done on occasional days at the Imperial Circle and at the Electors' Diets of 1619, 1627, 1630, 1636 and 1640.

The Diet of 1630 was preceded by Ferdinand's Edict of Restitution and the Peace of Lübeck after Wallenstein's defeat of Denmark. These both put the Emperor in a favourable position to succeed in achieving his goals.

The Diet of the Electors met at Regensburg in June, 1630, and was attended by the Catholic Electors in person, but by ambassadors only from Saxony and Brandenburg. The Emperor himself, the Empress, his eldest son, and two daughters made their entry into the city on the 19th of June. Afterwards appeared there representatives of the Palsgrave Frederic V, the English ambassador, Sir Robert Anstruther, the two French ambassadors, and the Papal Nuncio, while in behalf of Spain appeared the Duke of Tursi and James Bruneau

Anselm Casimir Wambold von Umstadt was one of those invited to the Diet, as Imperial Chancellor (Reichserzkanzler) and Bishop-Elector of Mainz. The meeting opened on the 3rd of July 1630 by Ferdinand himself. The Catholic Electors were present in person, whilst those of Saxony and Brandenburg were represented by ambassadors.

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