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People: John Churchill, 1st Duke of Marlborough

Rudolph of Habsburg, to win the approbation …

Years: 1273 - 1273

Rudolph of Habsburg, to win the approbation of Pope Gregory X, had renounced all imperial rights in Rome, the papal territory, and Sicily, and promised to lead a new crusade.

The Pope, in spite of Ottokar II of Bohemia's protests, not only recognizes Rudolph himself, but persuades King Alfonso X of Castile (another grandson of Philip of Swabia), who had been chosen German (anti-)king in 1257 as the successor to Count William II of Holland, to do the same.

Thus, Rudolph surpasses the two heirs of the Hohenstaufen dynasty that he had earlier served so loyally, and succeeds in saving the Holy Roman Empire from disintegrating by promoting the election of Rudolf I of Habsburg as emperor.

At the same time, he keeps the peace with King Charles I of Naples, who also has claims on the imperial throne.

In return for his support, Gregory makes Rudolph promise to lead a new crusade and to renounce claims on behalf of the Holy Roman Empire in Rome and the papal territories.

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