Though Burgundy had been brought under full imperial control, the kingdom was allowed a remarkable degree of autonomy. Conrad rarely intervened in its affairs following his coronation, returning only in 1038 to announce his son Henry as the kingdom's future ruler. Of central significance in the conquest of Burgundy was to augment the influence and dignity of the Emperor to the benefit of the Empire. With Burgundy secured, Conrad controlled the western Alpine passes into Italy and could easily block foreign invasions.