The Roman camp of Phoebiana (now Faimingen) was a bridgehead crossing the danube.

There was an Apollo temple being one of the largest buildings north of the Alps in that time.

The counts of Dillingen ruled from the 10th to the 13th century, then (1258) the territory was turned over to the Prince Bishops of Augsburg, who gained several villages for their clerical state, hence subdividing the region into several patches, which were dissolved in the early 19th century.

The white lion was part of the arms of the medieval county of Dillingen.

The black lion in the middle is taken from the arms of the dissolved district of Wertingen.