Al-Mustakfi vs Henry IV of HRE

Al-Mustakfi became caliph after the deposition of Al-Muttaqi. His reign was entirely under the control of the Buyid emir Mu'izz al-Dawla, who used the caliph as a figurehead to legitimize his rule.

Al-Mustakfi was deposed and blinded by Mu'izz al-Dawla after only two years. The Buyid emir accused him of plotting against him, but the real reason was to replace him with a more compliant caliph.

Al-Mustakfi died shortly after his deposition, possibly murdered on the orders of the Buyids. His death marked the end of a short and powerless reign.

Henry IV defeated Saxon rebels at Langensalza in Thuringia. The victory temporarily ended the Saxon Rebellion, but the conflict resumed later. The battle demonstrated Henry's military capability early in his reign.

Pope Gregory VII excommunicated Henry IV after Henry attempted to depose the Pope. The excommunication freed Henry's subjects from their oaths of loyalty, leading to a rebellion by German princes. This forced Henry to seek reconciliation at Canossa.

Henry IV traveled to Canossa Castle in northern Italy to seek absolution from Pope Gregory VII. He stood barefoot in the snow for three days before the Pope lifted his excommunication. This event symbolized the power struggle between secular and religious authority.

Henry IV besieged Rome and captured the city. He was crowned Holy Roman Emperor by Antipope Clement III. Pope Gregory VII took refuge in the Castel Sant'Angelo and was rescued by Norman forces under Robert Guiscard, who sacked Rome.