The death of Emperor Henry V on 23 May 1125 put an end to these squabbles, but soon Honorius was involved in a new power struggle in the Holy Roman Empire. Henry died childless and had nominated his nephew Frederick Hohenstaufen, Duke of Swabia, to succeed him as King of the Romans and Holy Roman Emperor. Of the German princes, the ecclesiastical faction was against any expansion of Hohenstaufen power, and they were determined to ensure that Frederick would not succeed Henry. Led by Archbishop Adalbert of Mainz, the Archchancellor of the empire, and under the watchful gaze of two papal legates, Cardinals Gherardo and Romano, the clerical and lay nobles of the empire elected Lothair of Supplinburg, Duke of Saxony. At Lothair's request, Cardinal Gherardo and two bishops then sent word to Rome to obtain Honorius's confirmation of the election, which he granted. This was a coup for Honorius, as such a confirmation had never occurred before, and around July 1126 Honorius invited Emperor Lothair to Rome to obtain the imperial title. Lothair was keen to keep Honorius on his side, keeping to the terms of the Concordat of Worms by not attending episcopal elections, agreeing that the investiture should only occur after the bishop's consecration, and that the oath of homage be replaced with an oath of fidelity.