The area around Petershausen has been inhabited for centuries by the Celts of the
Vindelici tribe. There are burial mounds that date as far back as 1500 BC near Petershausen (Obermarbach). The Romans and early Bavarians also inhabited the area. During Roman occupation, a
road from Salzburg to Augsburg passed through Petershausen. Part of this road would be used for oxen/cattle trading during the Middle Ages. The place name 'Petershausen' was first mentioned in a church document 1116 AD, concerning the local church (St. Laurentius). The 'Pertrichhof' in the center of the village was built around 1500 as a tavern and still exists today as a charming 'Wirtshaus'. The town and church were greatly damaged during the
Thirty Years War and by plague. During the
War of the Spanish Succession in 1704, the Austrians looted the church. Since 1755 there was a school in Petershausen. In 1867 the Munich - Ingolstadt railway line, on which the Petershausen station is located, was built. The town symbol (coat of arms) of Petershausen is a fish and a plow. ==Development==