Construction of the Cologne Cathedral began in 1248 and was not completed until 1880, with a generous break between 1560 and 1840. During the break, a medieval crane remained in place as a landmark of the Cologne skyline for 400 years. [0]

[0] https://de.wikipedia.org/wiki/Datei:Sch%C3%B6nscheidt,_J._H....