According to the editor (on the basis of Liverani and previous edition by Schiaparelli), to be identified with a small locality "in Valdichiana, not far from Montepulciano", province of Siena. Kurze, on the contrary, sticking to the formula in the text ("Actum in Brioni, finibus Taurinate"), points out "Taurinate" is used in contemporary charters only for Turin, and locate "Brioni" in Val della Torre, 15 km. NW Turin. This identification was recently accepted by Chiarle.
Editor of CDL 5:68 locates it in the "curtis Germaniciana", territory of Rieti
"Locus" in territory of Rieti, near river Velino
Probably in the territory of Penne (Abruzzo)
Editor identifies it with a "locus" North of San Clemente di Casauria, close to a small river named Torrente Cigno
According to the editor (following Saracco Previdi (1973), p. 668), locality near Rieti, possibly within the area of actual Pratolungo