In 1420, Frederick also moved his Tyrolean court from Meran to Innsbruck. After several rebellions by local nobles, his rule over Tyrol had stabilized, partially due to the successful beginning of silver mining that brought an increase in prosperity to the region. After the death of his brother Ernest on 10 June 1424, Duke Frederick also took over the regency over Inner Austria for his minor nephews Frederick V (the later Emperor Frederick III) and Albert VI. In his later years, however, he again had to cope with another rebellion against his Tyrolean rule, instigated by Prince-Bishop Alexander of Trent.