Throughout the 18th century, a fortress was created at Montjuïc overlooking the harbour. On 16 March 1794, While France and Spain were at war, the French astronomer Pierre François André Méchain was specified leave to enter the fortress to create observations which were to be used to measure the distance https://gothicquarterbarcelona75285.therainblog.com/32142396/sagrada-familia-an-overview