Labro was founded between the 9th and 10th century; the first lord of Labro was sworn by Otto I in the year 956.[4] During the middle ages, Labro was a possession of the city of Rieti and served as a stronghold to secure the border with the city of Spoleto. For this reason, Labro was involved in a number of battles, in particular with the bordering castle of Luco which was controlled by Spoleto.[5]