Peire Guilhem de Luserna (Italian: Pietro Guglielmo di Luserna) was a Piedmontese troubadour. Peire's identity as an Italian has been up for debate since the 19th century. "Luserna" more probably refers to Luserna in the Piedmont, rich and populous in Peire’s time, a town on the left bank of the Pellice lying on the road into the Viennois and Dauphiné, Occitan-speaking territories. On the other hand, it may be (Luserna in Italian) in the valley in Provence, on the road between in the Basses-Alpes and .