Rambertino di Guido Buvalelli (1170/1180 – September 1221), a Bolognese judge, statesman, diplomat, and poet, was the earliest of the podestà-troubadours of thirteenth-century Lombardy. He served at one time or other as podestà of Brescia, Milan, Parma, Mantua, Genoa, and Verona. Ten of his Occitan poems survive, but none with an accompanying melody. He is usually regarded as the first native Italian troubadour, though Cossezen and Peire de la Caravana may precede him. His reputation has secured a street named in his honour in his birthplace: the Via Buvalelli Rambertino in Bologna.
Rambertino was a law student at the University of Bologna in his youth and became attached to the Este court not long after. It was there that he made the acquaintance of Beatrice d'Este, whom he celebrates in all his songs. He was patronised by Azzo VI and he had strong ties to the Guelph party in Italy. He first appears as podestà of Brescia in 1201, when the Annales Brixienses ("Annals of Brescia") record that receptus est Rembertinus potestas ("Rambertino was received as podestà"). He made peace that year with Cremona, Bergamo, and Mantua. In 1203 he was again in Bologna, serving as a , his term in Brescia having ended. The next five years are obscure from a distance of eight hundred, but he was podestà of Milan in 1208. He appears in Milanese documents as Lambertinus Bonarelus and Lambertinus de Bonarellis, but there is no doubt among historians that they are references to the troubadour.