In 563, according to the writings of Gregory of Tours and Marius Aventicensis, a tsunami wave swept along the lake, destroying the fort of Tauredunum and other settlements, and causing numerous deaths in Geneva. Simulations indicate that the Tauredunum event was most likely caused by a massive landslide near the Rhône delta, which caused a wave eight metres (26 ft) high to reach within 70 minutes.[18][19][20] In 888 the town was part of the new Kingdom of Burgundy, and, with it, was absorbed into the Holy Roman Empire in 1033.