| 2021 | Estonian Academy of Arts, Tallin, Estonia | Karol Bayer, Ing. Jakub Ďoubal, doc., Mgr. art., Ph.D. Jan Vojtěchovský, Mgr. art., Ph.D. |
Training in Cleaning Methods for Stone Artworks, Wall Painting and Architectural Surfaces, Including Evaluation and Assement of the Treatment
