Sigebert III (c. 630–656) was the Merovingian king of Austrasia from 633 to his death around 656. He was described as the first Merovingian roi fainéant, or "do-nothing king", with the mayor of the palace in fact ruling the kingdom throughout his reign. Nevertheless, Sigebert lived a pious Christian life and was later sanctified, being remembered as Saint Sigebert of Austrasia in the Roman Catholic Church and Eastern Orthodox Church.
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Roi fainéant in the context of Theuderic III
Theuderic III (also spelled Theuderich, Theoderic or Theodoric; French: Thierry, c. 651–691) was King of the Franks in the 7th century. He ruled Neustria and Burgundy on two occasions (in 673 and again from 675 to 691), as well as Austrasia from 679 until his death in 691.
The son of Clovis II and Balthild, Theuderic has been described as a puppet ruler – a roi fainéant. After the death of his older brother Chlothar III, he was appointed King in Neustria by Ebroin, Mayor of the Palace, in 673, though Childeric II of Austrasia displaced him soon thereafter. After Childeric II was killed in 675, Theuderic II retook the throne. He subsequently fought a war against Dagobert II, with his forces under Ebroin victorious at the Battle of Lucofao. After Dagobert was murdered in 679, Theuderic was also recognized as king in Austrasia as well.
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