Process for the production of porous monolithic materials based on condensed tannins, said process comprising the following steps: a. obtaining a first liquid phase, said liquid phase being an aqueous solution of condensed tannins, b. obtaining a second phase, said second phase being either an oil or a volatile solvent not miscible with water, or air, or a mixture of oil and air or of a volatile solvent not miscible with water and air and said second phase not being miscible with the first phase, and at least one of said phases comprising a surfactant, c. dispersing said second phase in said first liquid phase, in the presence of a hardening agent, d. mixing said phases with stirring until the obtention: i. of a homogeneous and stable emulsion when the second phase is an oil or a volatile solvent not miscible with water, or ii. of a mixture which is macroscopically homogeneous but intermediate between an emulsion and a foam when the second phase is a mixture of oil and air or of a volatile solvent not miscible with water and air, or i. of a foam when the second phase is air, and e. either, i. carrying out the polymerization of the emulsion or of the emulsion-foam intermediate obtained in step d.i) or in step d.ii) until the obtention of a solid, washing if necessary and drying said solid, or, ii. carrying out the polymerization and drying said foam obtained in step d.iii). a. obtaining a first liquid phase, said liquid phase being an aqueous solution of condensed tannins, b. obtaining a second phase, said second phase being either an oil or a volatile solvent not miscible with water, or air, or a mixture of oil and air or of a volatile solvent not miscible with water and air and said second phase not being miscible with the first phase, and at least one of said phases comprising a surfactant, c. dispersing said second phase in said first liquid phase, in the presence of a hardening agent, d. mixing said phases with stirring until the obtention: i. of a homogeneous and stable emulsion when the second phase is an oil or a volatile solvent not miscible with water, or ii. of a mixture which is macroscopically homogeneous but intermediate between an emulsion and a foam when the second phase is a mixture of oil and air or of a volatile solvent not miscible with water and air, or i. of a foam when the second phase is air, and i. of a homogeneous and stable emulsion when the second phase is an oil or a volatile solvent not miscible with water, or ii. of a mixture which is macroscopically homogeneous but intermediate between an emulsion and a foam when the second phase is a mixture of oil and air or of a volatile solvent not miscible with water and air, or i. of a foam when the second phase is air, and e. either, i. carrying out the polymerization of the emulsion or of the emulsion-foam intermediate obtained in step d.i) or in step d.ii) until the obtention of a solid, washing if necessary and drying said solid, or, ii. carrying out the polymerization and drying said foam obtained in step d.iii). i. carrying out the polymerization of the emulsion or of the emulsion-foam intermediate obtained in step d.i) or in step d.ii) until the obtention of a solid, washing if necessary and drying said solid, or, ii. carrying out the polymerization and drying said foam obtained in step d.iii).