Duke Konrad Von Teck, as a result of hostilities with his neighbors, was not in the position to expand and complete his young city plans.

In 1321 the impoverished sons of Konrad sold their holdings "below the Egge" (Fuchseck Mountain), to which Heiningen and Boll belonged, to Count Eberhard I von Württemberg.

In a document from Feb 10, 1489, on which appears the oldest exhibit of the Heinginen Coat of Arms, Heiningen is noted as a "market town".

The people of Heiningen honorably sought from then on to gain strength, to preserve a maximum of freedom, and always to let themselves renew and affirm these values.

[citation needed] In 1284 a royal document records the establishment of the Heiningen weekly market, which remained for many years, but ended sometime in the 18th century.

The worst disaster came during the 30 Years War, after the Battle of Nördlingen in 1634, when the emperor's troops swept through the city like a roaring flood.

The immigration of Heimatvertriebene after the war did lead to a founding of a Roman Catholic Parish, which also serves nearby Eschenbach.