On Banntag, which in Allschwil, as in many other places, takes place on Ascension Day, the citizens of the municipality walk around part of the municipal boundary, divided into groups. Originally, it was the duty of the citizens to carry out a boundary inspection, i.e. to regularly check whether the boundary stones had not been moved wantonly by the neighbors. In the second half of the 20th century, it was rediscovered in many communities. In Allschwil, the Banntag has meanwhile become a popular and family festival on the Spitzwald fairground.
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