Großweier is an urban subdivision (Stadtteil) of the major county town (Große Kreisstadt) of Achern in the German state of Baden-Württemberg.

In 12 BCE, during the reign of Emperor Augustus, the region was conquered by the Roman Empire as part of Germania Superior.

[2] Both spiritual and secular rulers took possession of newly deforested land and thus increased their spheres of influence.

In the early 12th century, Crosvilare was the capital of eight surrounding small settlements, identified in the Reichenbach monastery records as farms or hamlets, including: Oberweier, Hesselbach, Rodt, Fronrode, High Hurst and Egdessenloch.

In the 13th century, the knights provided the city of Strasbourg with military aid against Walther von Geroldseck.

[6] In recognition of this service, the Count of Eberstein granted landed gentry to Junker Johann in 1263, during a hearing in Strasbourg.

By May 12, 1484, Philipp von Seldeneck became owner and Lord of Großweier for the princely sum of 2,500 guilders.

The Margrave of Baden used the moated castle in Großweier as the seat of the local bailiff, thus operating as a district court.

[7] In 1797, French troops occupied Großweier for approximately one year, until the end of the War of the First Coalition.

In 1852, Großweier voted to eliminate the poor and banish them, raising the minimum financing necessary to ship them from Le Havre to New Orleans.

A number of these immigrants died on the voyage or shortly after arrival to the United States, from yellow fever or other afflictions.

Großweier is home to the international headquarters of Hodapp GmbH & Co. KG, a manufacturer specializing in the production of steel doors and gates.

[11] Hodapp designs doors with a variety of safety features, including: fire protection, burglary, and radiation.

The company has a fleet of tractor-trailers that provide transportation services across Europe, as well as parts of the Middle East.