The fortress at Montjuïc, the most southerly issue from which measurements were being made when calculating the meridional definition on the metre Inside the 18th century, a fortress was built at Montjuïc that forgotten the harbour. In 1794, this fortress was employed by the French astronomer Pierre François André Méchain https://ricardolkvgj.gynoblog.com/27736744/getting-my-barcelona-to-work