1642-2511 Methodology of historical underground objects inventory surveys – contribution Metody inwentaryzacji historycznych obiektów podziemnych Ochałek Agnieszka author Jabłoński Mateusz author Lipecki Tomasz author Jaśkowski Wojciech author AGH University of Science and Technology, Adama Mickiewicza 30, 30-059 Kraków, Polska AGH University of Science and Technology, Faculty of Mining Surveying and Environmental Engineering Correspondence to: Agnieszka Ochałek Correspondence to: Mateusz Jabłoński jablon@agh.edu.pl Correspondence to: Tomasz Lipecki lipecki@agh.edu.pl Correspondence to: Wojciech Jaśkowski 27 09 2018 Vol. 17 (2018) 2018 43 51 Copyright © 2018 2018 <p>Geodetic surveys are used in an inventory of a lot of industries, including documentary of historic objects. One of the hardest historic objects that need to be inventoried are underground ones. Observations of rock mass movements and their consequences are very crucial issues, especially in the aspect of protection of historical objects, therefore it is needed to implement special methods (especially non-invasive) and specialist protection. In Poland there are few underground UNESCO mines and a lot of other objects of historical importance, for example built by Nazi Germans. Authors describe the following measurement methods: tacheometric surveys, terrestrial laser scanning (TLS),  leveling and as supporting methods: Airplane Laser Scanning (and its product: LIDAR), Global Positioning System and satellite images or geophysics methods.<br />There were inventory surveys conducted in Project Riese (German form – Giant) in Góry Sowie, Central Sudetes (Poland), is the biggest mining and building project of Second World War Germany. Until today, due to the lack of documentation, the purpose of these construction is uncertain. There are only hypothesis rather than facts. Currently, six underground complexes– Osówka, Włodarz, Soboń, Rzeczka, Jugowice, Gontowa, Książ Castle are discovered in the area of Góry Sowie. There are some speculations that all complexes were supposed to be combined. Some of the researchers of Góry Sowie secrets claim that kilometers of tunnels are still able to be discovered in the future. During the inventory the combination of classical measurements technologies and modern surveys methods were used – terrestrial laser scanner, tacheometry and GNSS measurements. Authors used collected data to analyze geometrical relations between objects Complex underground and ground of Osówka. This allowed to verify location of objects in relations to each other which was not previously presented in research. Many sections and profiles of excavations, sketches and maps were made.</p> 1 [1] A. Affek, Airborne laser scanning (ALS) in terrain modelling – new opportunities and pitfalls, PEK, T. 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