La Sorbumme
The accepted title for the town (or district of the city) which hosts the Fools' Guild's ownings in Quirm, housing the Guild's summer school and local Quirmian branch. Originally the independent Quirme Société Joyeux before being incorporated into the Ankh-Morpork Fools' Guild. La Sorbumme has something, er, fundamental, in common with Müning.
Annotation
Sorbumme being a very close homonym for La Sorbonne, the name generally used for the University of Paris.