Some remains of a hillfort from the Early Middle Ages, called Birg, can be found on the area of the municipality of Baierbrunn. The earliest known mentioning of Baierbrunn was in 776 on a deed of gift from Kloster Schäftlarn.
Historical remains of an early medieval hillfort, Birg, can be found in the municipality of Baierbrunn. The earliest known documentation of Baierbrunn is from 776, appearing as a recipient on a deed of gift from Kloster Schäftlarn.