proper noun/kɔ̃.fi.ty.ʁɛ̃.buʁ/
Confiturembourg is masculine in French.
the imaginary capital of the Realm of the Dolls (le royaume des poupées) in Alexandre Dumas's translation of E. T. A. Hoffmann's Nussknacker und Mausekönig (The Nutcracker and the Mouse King)
Related: confiturembourgeois, Confiturembourgeois, Confiturembourgeoise
Partial calque of German Konfektburg, using confiture (“jam”) + bourg (“burg”).