ed bust of the king on the obverse and a
cross surmounting a globe on the reverse. Dagobert's reign is sparsely recorded. The
Book of the History of the Franks, which has a Neustrian perspective, does not mention him again after describing his exile. The historian
Richard Gerberding says of the
History's author, "Either he did not believe that Dagobert had returned to become king or he did not want us to know of it". Paul Fouracre suggests that he did not regard Dagobert as a legitimate king, either because he had not been chosen with the support of the Neustrians; because he was considered a foreigner after his long exile; or because he was not considered throneworthy on account of the circumstances of his birth, his mother having been a concubine. Only one seventh-century work from within the Merovingian kingdoms, the
Life of Abbess Sadalberga of Laon, mentions the reign of Dagobert, and then only in passing. It records that
Sadalberga moved her convent from the suburbs of
Langres in northern
Burgundy to the city of
Laon because of forebodings, later proven true by "recent fighting between Kings Dagobert and Theuderic". This is the only mention of a war between Dagobert and his first cousin, Theuderic III of Neustria. It is an indication of the continuing animosity between Ebroin and the Austrasians, although it may have begun as a border dispute in the
Champagne. That the war was waged deep in Burgundy, which was under Neustrian rule, suggests that Dagobert for a time had the initiative. It may be during this war that Pippin and Martin launched the attack on Theuderic III that was defeated by Ebroin at the famous
Battle of Lucofao, resulting in Martin's death. While this battle may have taken place after Dagobert's death, a more likely date is September 679, when Dagobert was still alive and able to issue orders for the raising of levies. The war mentioned in the
Life of Sadalberga, however, cannot be dated precisely. It may have ended as early as September 677. In 676, Dagobert signed a "most firm pact of peace" with the
Lombards. This event can be dated precisely because the only source for it, the
History of the Lombards written by
Paul the Deacon towards the end of the eighth century, reports the appearance of a comet in August the same year. This comet was widely reported across the world from Ireland to Japan. Paul, however, mistakenly places the pact in the reign of the Lombard king
Grimoald, who died in 671, before Dagobert had even returned from Ireland. The Lombard king at the time of the comet was actually
Perctarit. The only surviving authentic charter issued by Dagobert confirms the possessions of the
monastery of Stavelot-Malmedy. In the charter, Dagobert refers to the donations made by his father, but does not mention that the monastery was founded by Grimoald, the man who had exiled him. Dagobert reintroduced the minting of gold, which had apparently been suspended by Childeric II around 670. His gold
tremissis broke with the old Frankish style and copied the
cross potent on three steps of contemporary
Byzantine solidi. Dagobert was also the last king in whose name coins were struck in
Marseille. The important royal coinage of Marseille, lasting from 613 until 679, was always struck with the name of a king, which was unusual since Frankish coins typically contain only the names of the moneyer and the mint. In 679, while on his way to
Rome to attend a church council, Wilfrid stayed at the court of Dagobert, who was grateful to the bishop for having facilitated his return from Ireland. Dagobert offered to appoint Wilfrid to the
diocese of Strasbourg, which the
Life of Wilfrid calls the "chief bishopric of his realm", but Wilfrid declined. Dagobert provided him with arms and companions for the rest of his journey to Rome. In Italy, Wilfrid stayed for a time at the court of Dagobert's new ally, Perctarit. In late 679, shortly after Wilfrid's visit, Dagobert was assassinated. The
Life of Wilfrid claims that this was engineered by "treacherous dukes" with the consent of the bishops. According to a late tradition, he was killed by his own godson, John, while hunting in the
Woëvre. The traditional date of his death, 23 December, is likewise based on late sources but widely accepted. Following Dagobert's death, Ebroin managed to extend Theuderic III's authority over Austrasia. On Wilfrid's return trip through Austrasia in 680, he was arrested by Ebroin's men, who blamed him for having arranged Dagobert's return. According to the report in the
Life of Wilfrid, Dagobert was a "destroyer of cities, despising the counsels of the magnates, reducing the people with taxation ... being contemptuous of God's churches and their bishops." It is possible that the reference to the destruction of cities refers to Dagobert's failure to protect them when Ebroin devastated the land after his victory at Lucofao. ==Martyr cult==