Résumé : The use of monotropic columnar mesophase to template the process of crystal growth was discussed. This control of the crystal structure by the mesophase template could pave the way to tailoring crystalline morphologies at the scale of individual columnar diameters. The study was carried out using two-dimensional (2D) synchrotron small- and wide-angle X-ray scattering, SAXS and WAXS, and high-resolution atomic force microscopy (AFM) techniques. The results show that the final crystalline morphology can be controlled by the parent mesophase structure down to the scale of an individual columnar diameter, which is essential for growth mechanism.