Dear Lyudmila! Accept my warmest congratulations on the anniversary! I am happy to express my sincere admiration for your unique research activity, which seems to be a source of inexhaustible energy, strength of spirit, optimism, vivacity, and for Russia an invaluable feat for the preservation of cultural heritage. Thanks to your devotion, extraordinary talent, multilateral educational work to the world, the veil of the unknown is opened, people acquire high