During the 18th century, a fortress was constructed at Montjuïc overlooking the harbour. On 16 March 1794, Although France and Spain had been at war, the French astronomer Pierre François André Méchain was offered leave to enter the fortress to make observations which were for use to measure the space https://barcelona-travel-guide54679.bloggerswise.com/40434882/the-ultimate-guide-to-barcelona-attractions