1816 Diepenbend/Aachen-1859 Dusseldorf, was a German history painter. Rethel was born in Aachen in 1816. He showed an interest in art in his early life, and at the age of thirteen he executed a drawing which procured his admission to the academy of D??sseldorf. Here he studied for several years, and produced, among other works, a figure of St Boniface, which attracted much attention. At the age of twenty, Rethel moved to Frankfurt, and was selected to decorate the walls of the imperial hall in the Rmer with figures of famous men. At the same period he produced a series of designs illustrative of Old Testament history. Four years later, Rethel was the successful competitor for the work of ornamenting the restored council house of his native city with frescoes depicting prominent events in the career of Charlemagne, but the execution of this work was delayed for some six years. Meanwhile Rethel occupied himself with the production of easel pictures and of drawings. In 1842, he began a striking series of designs dealing with the Crossing of the Alps by Hannibal, in which the weird power which animates his later art becomes first apparent. In 1844 Rethel visited Rome, executing, along with other subjects, an altar-piece for one of the churches of his native land. In 1846, he returned to Aachen, and commenced his Charlemagne frescoes.