Hanstholm Lighthouse (with four-man residence) was built on Hanstholmknuden in 1843 as Denmark's largest and most powerful lighthouse. By that time, Jørgen Hansen Koch had the overall responsibility for the construction of the lighthouses, as the governor of the building, and Georg Holgreen was assigned the task of conducting the construction of a fire at Fornæs and Hanstholm. However, the original construction, completed in 1842, was too weak to carry optics and cracked. The contract was not accurate enough to place the responsibility, but Murmester Sibbern for tearing his own account tower down and built a new and stronger one. Sibbern admitted that he had misunderstood the instructions regarding the thickness of the walls, but maintained that the original drawings from Holgreen had not been good enough. This criticism went on to Holgreen to such an extent that he was hanging in the lighthouse basement. After that, Jens Poulsen Jacobsen became a new conductor. The lighthouse was completed on 6 November 1843 and went into operation on 15 December. In 1889, Hanstholm Lighthouse became the first Danish guy to be fitted with electric light and was also given a 1st order fresnel lens, which made it the most powerful guy in the world for a period. https://da.wikipedia.org/wiki/Hanstholm_Fyr