He formally confirmed the popular
legal traditions of
Saxony and issued new constitutions for
Lombardy. In 1028 at
Aachen he had his son Henry elected and anointed king of
Germany. Henry married
Gunhilda of Denmark, daughter of King
Canute the Great of
England, Denmark and
Norway by
Emma of Normandy. This was an arrangement that Conrad had made many years prior, when he gave Canute the Great parts of northern Germany to administer. Henry, the later Emperor
Henry III, became chief counselor of his father.
Conrad campaigned against
Poland in 1028 and forced
Mieszko II, son and heir of
Boleslaus I, to make peace and return land that Boleslaw I had conquered from the Empire during his father's reign. At the death of Henry II the bold and rebellious Duke of Poland
Mieszko II had tried to throw off vassalage, but then submitted and swore to be Emperor Conrad's faithful vassal. Mieszko II quit being self-anointed king and returned to being duke of Poland.
In 1029 some
Bavarian border conflicts undermined the good relations with
Stephen I of Hungary. One year later Conrad launched a campaign against
Hungary. The Hungarians successfully used the
scorched earth tactics and the emperor had to withdraw with his army. Finally the Hungarian army forced him to surrender at
Vienna. After his defeat Conrad was obliged to cede some border territory to Hungary.
When
Rudolph III, King of Burgundy died on
February 2, 1032, he bequeathed his kingdom, which combined two earlier kingdoms of Burgundy, to Conrad. Despite some opposition, the Burgundian and Provencal nobles paid homage to Conrad in
Zürich in 1034. This kingdom of Burgundy, which under Conrad's successors would become known as the
Kingdom of Arles, corresponded to most of the southeastern quarter of modern France and included western Switzerland, the Franche-Comté and Dauphiné. It did not include the smaller
Duchy of Burgundy to the north, ruled by a cadet branch of the Capetian
King of France. (Piecemeal over the next centuries most of the former Kingdom of Arles was incorporated into France - but King of Arles remained one of the Holy Roman Emperor's subsidiary titles until the dissolution of the Empire in 1806.)
Conrad upheld the rights of the
valvassores (knights and burghers of the cities) of
Italy against Archbishop Aribert of Milan and the local nobles. The nobles as vassal lords and the
bishop had conspired to rescind rights from the burghers. With skillful diplomacy and luck Conrad restored order.