Template:On this day - June 17

Julián Marías.

• 1094 – Rodrigo Díaz de Vivar, El Cid Campeador, conquers Valencia.
• 1460 – Death of Fortún Velázquez de Cuéllar, Spanish aristocrat and churchman (b. c. 1405).
• 1563 – Jerónimo Luis de Cabrera founds the Villa de Valverde del Valle de Ica, in the present-day Department of Ica, in Peru.
• 1597 – Birth of Juana de la Cruz, Spanish beata and writer (d. 1675).
• 1665 – Spanish forces are defeated by Portuguese forces at the Battle of Villaviciosa (1665), part of the Portuguese Restoration War.
• 1681 – Charles II authorizes by Royal Decree the opening of the College of San Telmo, to be administered by the University of Mariners of Seville, in order to train pilots to man the ships of the Indies routes.
• 1738 – Philip V authorizes by Royal Decree the creation of the Royal Academy of History.
• 1773 – In the Viceroyalty of New Granada (present-day Colombia), Juana Rangel de Cuéllar founds the city of Cúcuta.
• 1777 – The enlightened governor Luis de Unzaga y Amézaga is appointed to create the Captaincy General of Venezuela.
• 1781 – Birth of Francisco Espoz y Mina, Spanish military officer (d. 1836).
• 1787 – Death of José de Gálvez y Gallardo, Spanish jurist and politician, one of the main promoters of the Bourbon Reforms (b. 1720).
• 1815 – The Battle off Cape Gata takes place, within the Second Barbary War, between the United States and the Ottoman regencies of North Africa.
• 1845 – The Battle of Cachimán takes place, fought against the Haitians to uphold the Independence of the Dominican Republic.
• 1876 – Death of Fermín Caballero, Spanish geographer, journalist, writer, politician and orator (b. 1800).
• 1880 – The Battle of Olivera takes place between the forces loyal to president Nicolás Avellaneda and the rebels answering to the governor of Buenos Aires, Carlos Tejedor, as part of the last Argentine civil war, the Revolution of 1880.
• 1898 – Death of Carlos de Haes, Spanish painter of Dutch origin (b. 1829).
• 1905 – Death of Máximo Gómez Báez, Dominican military officer of the Ten Years' War and General in Chief of the Cuban revolutionary troops in the Cuban War of Independence (b. 1836).
• 1914 – Birth of Julián Marías, Spanish philosopher and essayist.
• 1921 – In Barcelona (Spain) Evelio Boal (secretary of the committee of the CNT) is murdered at the door of the Modelo prison.
• 2018 – After the 2018 Colombian presidential election, the lawyer Iván Duque is invested as president-elect of the Republic of Colombia.