Other works by Sigebert are a life of the Frankish king Sigebert III ("Vita Sigeberti III regis Austrasiae"), founder of the monastery of St. Martin at Metz. While at Metz he wrote the biography of Bishop Theodoric I of Metz (964–985), and also a long poem on the martyrdom of St. Lucy, whose relics were venerated at the Abbey of St. Vincent. After his return to Gembloux he also wrote similar works for this abbey, namely a long poem on the martyrdom of the Theban Legion—as Gembloux had relics of its reputed leader St. Exuperius (d. 262)—and a history of the early abbots of Gembloux to 1048 ("Gesta abbatum Gemblacensium").