Holy Roman Emperor Henry IV is forced to abdicate in favor of his son, Henry V, in Ingelheim.

The Holy Roman Emperor, originally and officially the Emperor of the Romans during the Middle Ages, and also known as the Roman-German Emperor since the early modern period, was the ruler and head of state of the Holy Roman Empire. The title was held in conjunction with the title of King of Italy from the 8th to the 16th century, and, almost without interruption, with the title of King of Germany throughout the 12th to 18th centuries.

Henry IV was Holy Roman Emperor from 1084 to 1105, King of Germany from 1054 to 1105, King of Italy and Burgundy from 1056 to 1105, and Duke of Bavaria from 1052 to 1054. He was the son of Henry III, Holy Roman Emperor—the second monarch of the Salian dynasty—and Agnes of Poitou. After his father's death on 5 October 1056, Henry was placed under his mother's guardianship. She made grants to German aristocrats to secure their support. Unlike her late husband, she could not control the election of the popes, thus the idea of the "liberty of the Church" strengthened during her rule. Taking advantage of her weakness, Archbishop Anno II of Cologne kidnapped Henry in April 1062. He administered Germany until Henry came of age in 1065.

Henry V was King of Germany and Holy Roman Emperor, as the fourth and last ruler of the Salian dynasty. He was made co-ruler by his father, Henry IV, in 1098.

Ingelheim, officially Ingelheim am Rhein, is a town in the Mainz-Bingen district in the Rhineland-Palatinate state of Germany and also the seat of the Mainz-Bingen district. The town sprawls along the Rhine's left bank. It has been Mainz-Bingen's district seat since 1996.