Medallion of Charles V, ruler of both the Holy Roman Empire and the Spanish Empire, Plaza de Espana (Spain Square), Seville.

Charles V (24 February 1500 - 21 September 1558) was ruler of both the Holy Roman Empire from 1519 and the Spanish Empire (as Charles I of Spain) from 1516, as well as of the lands of the former Duchy of Burgundy from 1506. He stepped down from these and other positions by a series of abdications between 1554 and 1556. Through inheritance, Charles brought together under his rule extensive territories in western, central, and southern Europe, and the Spanish viceroyalties in the Americas and Asia. As a result, his domains spanned nearly 4 million square kilometres (1.5 million square miles), and were the first to be described as 'the empire on which the sun never sets'. The Plaza de Espana is a plaza in the Parque de Maraa Luisa (Maria Luisa Park), in Seville, Spain, built in 1928 for the Ibero-American Exposition of 1929. It is a landmark example of the Regionalism Architecture, mixing elements of the Renaissance Revival and Moorish Revival (Neo-Mudejar) styles of Spanish architecture. (Photo by: David Henley/Pictures From History/Universal Images Group via Getty Images)