963.... In the meantime pope John, forgetting his promise, fell away from the emperor and joined the party of Berengar, and allowed Adalbert to enter Rome. When Otto heard of this he abandoned the siege [of San Leo] and hastened with his army to Rome. But pope John and Adalbert, fearing to await his arrival, seized most of the treasures of St. Peter and sought safety in flight. Now the Romans were divided in sympathy, part favoring the emperor because of the oppressions of the pope, and part favoring the papal cause; nevertheless, they received him in the city with the proper respect, and gave hostages for their complete obedience to his commands. The emperor having entered Rome, called together there a large number of bishops and held a synod; it was decided at this synod that he should send an embassy after the pope to recall him to the apostolic seat. But when John refused to come, the Roman people unanimously elected the papal secretary Leo [VIII] to fill his place. 30-31. The Acquisition of Burgundy by the Empire, 1018-1032. 30. Thietmar of Merseburg. M. G. SS. folio, III, p. 863. The kingdom of Burgundy or Arles was formed by the union of the two small kingdoms of Provence and Upper Burgundy, the beginning of which is told in Regino (see no. 22). The result of the acquisition of Burgundy was not to increase the territory of Germany, but to add another kingdom to the empire, which now included Germany, Italy, and Burgundy. VIII, 5. Now I shall break off the relation of these negotiations in order to tell of the good fortune which lately befell our emperor, Henry [II]. For his mother's brother, Rudolf, king of Burgundy, had promised him his crown and sceptre in the presence and with the consent of his wife and his step-sons and all his nobles, and now this promise was repeated with an oath. This happened at Mainz in the same year [February, 1018]. 31. Wipo, Life of Conrad II. M. G. SS. folio, XI, pp. 263 ff. 8. Rudolf, king of Burgundy, in his old age ruled his realm in a careless fashion and thereby aroused great dissatisfaction among his nobles. So he invited his sister's son, the emperor Henry II, to come to him, and he designated him as his successor and caused all the nobles of his realm to swear fealty to him.... Now after the death of Henry [1024], king Rudolf wished to withdraw his promise, but Conrad [II], desiring to increase rather than to diminish the empire and to reap the fruits of his predecessor's efforts, seized Basel in order to force Rudolf to keep his promise. But queen Gisela, the daughter of Rudolf's sister, brought about reconciliation between them.