From the classification of closed surfaces, it follows that any closed surface can be obtained by gluing discs and pants along their boundaries. I wonder whether a similar statement holds in higher dimensions. >Let $n\geq 3$. Does there exist a finite collection $\mathcal{C}$ of $n$-manifolds with boundary such that any closed $n$-manifold can be obtained from manifolds of $\mathcal{C}$ by identifying connected components of their boundaries? I think a negative answer is known, but I am looking for precise references. **PS:** If needed, you can consider that the manifolds here are smooth. **PSS:** I asked the same question on [math.stackexange][1]. [1]: http://math.stackexchange.com/questions/1934035/manifolds-from-fundamental-pieces