 Godfrey III could again strengthen his position, when in 1054 he married Beatrice, a sister of the later Upper Lorraine duke Frederick III, and ruled as Margrave of Tuscany from 1056.He reconciled with the emperor and in 1065 regained the Duchy of Lower Lorraine from the hands of King Henry IV.However, the line of Lower Lorraine dukes became extinct upon the assassination of his son Duke Godfrey IV the Hunchback in 1076.