http://www.stadt-kaub.de/kaub/stadtrundgang/bluecher.htm

Die sog. Schildgerechtigkeit, also die Schankerlaubnis wurde aber schon 1764 für das Haus "Stadt Mannheim" durch die kurpfälzische Hofkanzlei erteilt.


The right of serving food and drink

http://www.bamberger-bier.de/html/body_hist__details.html

Commoners were only allowed to brew beer with a special permit, the so-called “brewing rights”. Making beer was initially restricted to one’s own personal use. Whoever owned these brewing rights could sell his surplus beer to the public. Thus the beginnings of commercial beer production developed. To indicate the serving of beer to the public the landlords attached signs (“Gastfrieden”) to their house walls. Later from this the so-called “Schildgerechtigkeit” developed, i.e. fixing an emblematic trade sign to the house front which advertised the sale of beer.