 Long before Innsbruck became a city, references to an "Amras" or "Omras" appeared in documents dating from the 10th century.This early fortification in what was then the southwest corner of Bavaria was the seat of power of the Counts of Andechs, who became Margraves of Istria and later Dukes of the short-lived Imperial State of Merania from 1180 to 1248.This original fortification was destroyed in 1133 and no traces of it remain, although some of the material from the original structure was later used in the modern building.