Template:On this day - May 7

Charles III of Spain

• 1298 – In Barcelona (Kingdom of Aragon, present-day Spain), over an old Romanesque cathedral, itself built over a church of the Visigothic period, which had been preceded by an Early Christian basilica, the first stone of the Barcelona Cathedral is laid.
• 1704 – King Peter II recognizes Archduke Charles of Habsburg as legitimate successor to the Spanish crown with the title of Charles III.
• 1762 – In Italy the Carolino Aqueduct is inaugurated, commissioned by King Charles III of Spain to supply water to the Royal Palace of Caserta and the San Leucio complex.
• 1765 – Death of Hipólito Rovira, Spanish painter and engraver (b. 1695).
• 1778 – Birth of Miguel de la Bárcena, Argentine judge and governor (d. 1853).
• 1810 – In Spain, during the Napoleonic invasion the French army is defeated at the Battle of Galera in Granada.
• 1813 – In the United Provinces of the Río de la Plata, the Assembly of the Year XIII enacts the first Mining Promotion Law.
• 1839 – Death of José María Heredia, Cuban poet (b. 1803).
• 1842 – Birth of Alberto Aguilera, Spanish politician and jurist (d. 1913).
• 1881 – In the city of La Plata (capital of the Province of Buenos Aires), Dardo Rocha (founder of the city) orders by decree the construction of the La Plata Astronomical Observatory.
• 1889 – Death of Francisco Fernández Iparraguirre, Spanish pharmacist, botanist and linguist (b. 1852).
• 1891 – In Madrid (Spain) the first stone of the building of the Royal Spanish Academy is laid.
• 1893 – In Madrid (Spain), Queen Maria Christina inaugurates the Stock Exchange Palace.
• 1926 – In the course of the Moroccan War, the Franco-Spanish offensive against the rebel leader Abd el-Krim begins, after the failure of the Oujda Conference.
• 1937 – The Nazi Condor Legion, equipped with Heinkel He 51 biplanes, arrives in Spain to support the forces of Francisco Franco.
• 2007 – In the city of Montevideo (Uruguay), the Mercosur Parliament is installed, with representatives of the five member countries.
• 2011 – In Ecuador the Constitutional Referendum and Popular Consultation proposed by President Rafael Correa is held.
• 2023 – Death of Patricio Bañados, Chilean journalist, radio announcer and presenter (b. 1935).