  We define 2-dimensional topological substitutions. A tiling of the Euclidean
plane, or of the hyperbolic plane, is substitutive if the underlying 2-complex
can be obtained by iteration of a 2-dimensional topological substitution. We
prove that there is no primitive substitutive tiling of the hyperbolic plane
$\mathbb{H}^2$. However, we give an example of substitutive tiling of $\Hyp^2$
which is non-primitive.
