He realized the prinziples of the movements of planets and formulated the concernig physical laws.
At the time Grieskirchen got his grant privileges of a town in 1613 Johannes Kepler lived nearby in Linz and was a member of the provincial government. His area of authority was the countryside mathematics.
Most probably he participated at the cerenomy granting the town privileges of Grieskirchen with the then first major of Grieskirchen Christoph Manglburger. Manglburger owed the local inn (at that time Stadplatz 8, today Stadplatz 4 "Zum Weißen Kreuz"/Zweimüller). Possibly Kepler spent the night at Manglburgers inn because the road from Linz to Grieskirchen and back could not be tackled within one day.