Giselbert of Luxembourg (c. 1007 – 14 August 1059) was count of Salm and of Longwy, then count of Luxemburg from 1047 to 1059. He was a son of Frederick of Luxembourg,[1] count of Moselgau, and perhaps of Ermentrude of Gleiberg.
At first count of Salm and of Longwy, on his brother Henry II's death he inherited the county of Luxembourg,[2] as well as providing the income for the abbeys of Saint-Maximin in Trier and Saint-Willibrord in Echternach. He got into an argument with the archbishop of TrierPoppon as to the abbaye Saint-Maximin, which was arbitrated by his brother Adalbero III, bishop of Metz.
In 1050, since the population of the town of Luxembourg had risen considerably, he expanded the city by building a new fortified wall around it.
