The influence of the activation temperature on textural characteristics of activated carbon prepared by partial gasification of a carbonized product (C-600) from rockrose wood (Cistus ladaniferus L.) was studied. Activations were effected in air, CO2, and steam. The temperature ranged between 450-degrees and 750-degrees-C in air and between 750-degrees and 950-degrees-C in CO2 or steam. Burnoff was 40%. Techniques used in the characterization study of the samples were gas adsorption (N2, 77K; CO2, 298K), mercury porosimetry, and density measurements. As temperature was increased, the microporosity increased for activations of C-600 in air, whereas the macroporosity decreased in CO2 and in steam. The development of mesoporosity was greater when activating in steam at the lowest temperature. The product of steam activation at 750-degrees-C had the best textural characteristics.