the partial preservation and restoration of the shura palace in persepolis will be completed in april 1402. this restoration has been started 6 months ago with the latest scientific methods by the domestic experts of the country. the sun, wind and rain are factors that threaten persepolis. it can become ancient with care scientists and restorers of our country have started the partial protection and restoration of the shura palace in persepolis 6 months ago. part of it is done for me in persepolis with the latest scientific methods in the world. the workers use a special mortar called martel don, which we use for the parts that have seams, cracks, and fractures, so that we can prevent further destruction and erosion of the stone as much as possible. we used to use cement to restore works it would be possible, but the new materials, in addition to strengthening the renewable part, if in the future the materials and materials of our best offer can easily be removed and replaced with new materials, the protection of this global work, which is the human heritage , will dissolve over time,