The city is known for the "Fête du Flan", literally Flan Party, which takes place every last weekend of September on the banks of the Seine. This is a garage sale. The bakeries of the city have on this occasion several stands on which it is possible to consume flan. The city entered the Guinness Book in 1995 for having made the largest flan in the world (5.10 m in diameter).[3]
Population
Inhabitants are known as Triellois or Trielloises according to gender.
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Seligenstadt, located in the south-east of Frankfurt, twinned since 1967. Triel-Seligenstadt was elected "Jumelage emblème de l'amitié franco-allemande" (Twin towns symbol of the french-german friendship) in June 2013.[5]