Appointed Mint Warden and General Mint Warden in Cologne (City), Germany, on 25 September 1752, positions that he held until
shortly before his death. Langenberg was baptised on 7 October 1708 and was buried on 10 November 1772. Lit.: Alfred Noss,
Die Münzen der Städte Köln und Neuss: 1474-1794 (1926) pp. 47-49, 321, 328; Wolfgang Scheffler, Goldschmiede Rheinland-Westfalens
- Aachen - Köln (1973) n. 1741, p. 612.