Carbon and metal nitrides are appealing classes of materials, as their properties can complement carbon, on the one hand, and metal oxides, on the other, in a variety of applications. A larger number of reports in the literature concern the synthesis of different modifications of carbon nitrides, while at ambient conditions graphitic-C 3 N 4 (g-C 3 N 4 ) is regarded to be the most stable allotrope. The bulk-material synthesis of g-C 3 N 4 generally includes pyrolysis of nitrogen-rich precursors, often incorporating triazine rings or generating them during synthesis. Kroke et al. proposed that g-C 3 N 4 consists of sheets of ordered tri-s-triazine moieties connected through planar tertiary amino groups. However, it was also shown that the bulk reaction most likely does not proceed significantly past the polymeric form due to incomplete condensation or polymerization in the bulk. Just recently, the salt-melt-supported synthesis has been shown to produce nearly pure C 3 N 4 material. Graphitic carbon nitrides have recently been applied as catalysts and photocatalysts. To enhance its performance, mesoporous g-C 3 N 4 was synthesized using silica nanoparticles as templates, which yields materials with surface areas of up to 450 m 2 g Γ1 and spherical pores of 12 nm, which were, however, arranged in a nonregular fashion. Ordered but macroporous g-C 3 N 4 has been prepared using a silica colloidal crystal as template. Mesoporous silica has been used as template to synthesize periodic meso-and microporous nitrogen-containing carbons, but these materials exhibit C/N ratios far above the theoretical value of 0.75 that is calculated for ''C 3 N 4 ''. It seems that so far no ordered, mesoporous, graphitic carbon nitride with stoichiometry close to the ideal C 3 N 4 has been prepared. This is probably due to the structure of g-C 3 N 4 , which is composed of large, sterically demanding building blocks (tri-s-triazine) that are, in addition, arranged in a graphitic stacking. Considering these structural motifs, small pores in particular and their associated pore-wall curvature cannot be adequately replicated by the 2D stiff structure of the layers. A similar observation has already been COMMUNICATION www.advmat.de[*] Prof.