These settled in the area and founded many places with the endings "-ingen", which is thought to be the origins for the city Name of "Me-ingen (now Mengen).

On March 4, 1276 Mengen acquires the municipal law, issued in Augsburg by King Rudolf von Habsburg.

Mengen was 1276 to 1805 as one of the so-called five Danube cities Vorderösterreich (together with Ehingen, Munderkingen, Riedlingen and Bad Saulgau).

The inhabitants had intensively called the Mother of God, to stand next to them and therefore wrote this also the salvation of the city from the attacking soldiers, which is why the May Day is celebrated annually in Mengen today.

Then the "Great Fire of Mengen', which was fought by comparatively simple means fell, many buildings victim.