Sergey Sementsov, Doctor of Architecture, Professor. The author of over 300 articles and monographs on the study of historic buildings and historic urban areas of Leningrad - St. Petersburg and territories before the Foundation of St. Petersburg. He is a Member of the Saint Petersburg Union of architects and an adviser to the Russian Academy of Architecture and Construction Sciences (RAASN). It is developing a system for identifying and protecting architectural and cultural monuments. It is engaged in the formation of protective zoning and preparation of passports of historical and cultural monuments. Performed state historical and cultural expertise for a number of cultural heritage sites. Coordinator of work on the preparation of proposals and approval of materials for the World Heritage Site "Historical center of Leningrad and its associated groups of monuments", as well as on related proposals to expand the scope of restoration work in Saint Petersburg and Leningrad region.Alexander Leontyev, Member of the Union of Architects of Saint Petersburg, member of the Council for the preservation of cultural heritage under the Governor of Saint Petersburg. Author of biographical research on architects J.-B. A. Leblon, A. I. Semenov, N. N. Belekhov, A. E. Gessen, E. V. Kazanskaya; author of articles on the restoration of architectural monuments on the topics of post-war restoration of Great Peterhof Palace, Marly Palace, Monplaisir Palace complex and objects in Lower Park of Peterhof, Chinese Palace in Oranienbaum and historical objects in Saint Petersburg. Supervised the restoration of the objects in Peterhof and Saint Petersburg, including developed projects for the restoration of especially valuable objects of cultural heritage in the Museum-reserve Peterhof: Grand Palace with the Church body and the body under the arms, a complex of Monplaisir Palace, Hermitage, Marly Palace, Voroninskaya colonnade and the lion cascade in Lower Park, cottage Palace, Gothic chapel, manor Palace and Telegraph station in Alexandria Park, Tsaritsyn and Olga pavilions in the rustic Park. He supervised a specialized architectural and restoration workshop at Lenproektrestavratsiya Institute. He led design and restoration work on the objects of Peterhof Museum and religious buildings in Saint Petersburg: Kazan Cathedral, Kazan Church of Novodevichy monastery, Church of St. Anna Kashinskaya, the courtyard of the Holy Trinity Cottage monastery with the Church of St. Peter Metropolitan of Moscow, Alexander Nevsky Lavra. He supervised the historical and architectural research of the development of the Central District of Saint Petersburg. Conducted urban planning, historical and cultural and technical and economic expertise of cultural heritage objects for the collection of historical and cultural monuments of the peoples of the method of doctor of architecture T. A. Slavina, Chief architect of the Institute "Lenproektrestavratsiya". The chief architect of the Peterhof state Museum-reserve.Dr. Santiago Huerta is a tenured professor of Project and Structural Calculation at the Escuela Técnica Superior de Arquitectura de Madrid (ETSAM). He obtained his doctorate in 1990 and achieved the Universidad Politécnica de Madrid Extraordinary Doctoral Thesis Award. In the last twenty years, he has worked as a consultant for Analysis of Historical Constructions. He has been secretary and deputy director of the Department of Structures of ETSAM. He is co-founder and president of the Spanish Society for the History of Construction (SEDHC) and is currently the director of publications for the Juan de Herrera Institute. He was chair of the First International Congress on Construction History (Madrid, 2003). Since 1996, he has been chairing of the already eleven Spanish Congresses on Construction History and of the First and Second International Hispano-American Congresses on Construction History. He is the author of more than 80 publications among books (editor), papers in specialized journals, and communications to congresses. The scientific and professional interests of Dr. Santiago Huerta are connected with the History of Construction, Masonry Arches Vaults, and Domes.
