The paper is devoted to an outstanding German instrument-maker of the 17th century Lucas Brunn and the universal angle-measuring instrument designed by him that is now stored at the M. V. Lomonosov Museum of Peter the Great Museum of Anthropology and Ethnography (the Kunstkamera) of the Russian Academy of Sciences. This master’s work was closely connected with the history of the Dresden Kunstkammer and mint. He introduced the micrometer screw and worked to improve the angle-measuring instruments. Despite the importance of the instrument stored at the Kunstkamera for the history of science, it occupies a very modest place in the exhibition – as modest as its inventor’s place in the Russian historiography, and attracting attention to Brunn and his instrument is one this paper’s objectives.