The peninsular Koller Island (Kollerinsel) is one of the few pieces of land on the left bank of the Rhine that belong to Baden-Württemberg.

From 1405 until 1600, the lords of Handschuhsheim governed the land as a temporal fief from Speyer and the Electorate of the Palatinate of the Rhine.

This division of temporal and spiritual dominion (condominium) ended with a treaty in which Speyer withdrew its worldly rights in 1709.

Live and celebrate on the Rhine is the motto of the communities jubilee, "850 Years Brühl" on 13 March 2007.

The white and blue colors refer to the lords of the Electorate of the Palatinate of the Rhine, the Wittelsbachs.