Emperor Conrad II would later appoint the Counts of Burghausen as the financial administrators of the locality.

But, as latest excavations have shown, the area around the main court of Burghausen's castle has at least been inhabited since the Bronze Age.

With Archaeologists finding artifacts of the pre-metal Celtic, Iron Age, and Roman era, it is hard to pinpoint a "founding" date.

Starting in 1255, after the first division of Bavaria, Burghausen gained political and economic prominence as the second residence of the Lower Bavarian dukes.

Burghausen's main source of income was the trade in salt from Hallein, (modern-day Austria).

By the end of the 14th century, Burghausen had become an administrative center as the site of the area's revenue office.

The parish church St. Jakob was consecrated in 1140, reconstructed after a fire in 1353 but the dome of the spire was created only in 1778/81.

These buildings are all situated at Burghausen's grand central square Stadtplatz, same as the baroque Guardian Angel Church.