A wood framed three pieced plaque depicting three major periods of the history of Portugal. The three Portuguese history eras depicted are from left to right: Portuguese interregnum crisis of 1383–1385 (Crise De 1383-1385) was a civil war in Portuguese history during which no crowned king of Portugal reigned. The interregnum (a period of discontinuity or "gap" in rule of the land or country) began when King Ferdinand I died without a male heir and ended when King John I was crowned in 1385 after his victory during the Battle of Aljubarrota. Portuguese Restoration War 1640–1668 - was the war between Portugal and Spain that began with the Portuguese revolution of 1640 and ended with the Treaty of Lisbon in 1668, bringing a formal end to the Iberian Union.  The Iberian Union was the dynastic union of the Kingdoms of Castile and Aragon of Spain and the Kingdom of Portugal under the Castilian Crown that existed between 1580 and 1640. Reconquista Crista 711-1492 - the reconstruction period in Iberian history in which the Christian kingdoms of Spain and Portugal fought the invading Muslim Umayyad empire of Arab-Berber forces.  After the surrender of Granada in January 1492, the entire Iberian peninsula was controlled by Christian rulers. Behind each intricate bronze relief is a brief description history written by Professor Verissimo Serrao of Lisbon University.   Dimensions Height: 11.7 cm (4.6 inches) Width: 35.8 cm (14.09 inches)