When Louis married Gerberga, sister of Otto, and widow of Giselbert, duke of Lorraine, there seemed to be a The emperor Louis I.
In 921 Charles recognized Henry as king of the East Franks, and when in 9 2 3 the French king was taken prisoner by Herbert, count of Vermandois, Lorraine came under Henry's authority, and Giselbert, who married his daughter Gerberga, was recognized as duke.
Carloman's widow Gerberga had fled to the protection of the Lombard king, who espoused her cause and requested the new pope, Adrian I., to recognize her two sons as the lawful Frankish kings.
Gerberga and her children were delivered up and disappear from history; the siege of Pavia was undertaken; and at Easter 774 the king left the seat of war and visited Rome, where he was received with great respect.
Especially influential, too, in this respect was the letter which the monk Adso in 954 wrote to Queen Gerberga, De ortu et ternpore Antichristi.