The Chain Tower
France
The 186th tallest tower in the world
The Chain Tower (1384) (La tour de la Chaîne) along with the Lantern tower and the Saint Nicolas Tower, is one of the three medieval towers guarding the port in La Rochelle, France. It is called the Chain tower because an actual chain was stretched across the port entrance from this building. In 1879 the French government classified it as a Monument historique (MH).
Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).