The Spanish Empire was extensive, encompassing regions such as Germany, Austria, Switzerland, the Netherlands, and parts of France and Czechoslovakia. This vast territory signifies the empire's significant influence in Europe and the diverse cultures it integrated under Spanish rule. The reach of the empire played a crucial role in shaping European history, as it facilitated exchanges in trade, culture, and politics across these regions.

In "A History of Spain," author Arturo Pérez-Reverte delves into the complexities of Spain’s past, illustrating how the empire's expansion affected not only the lands it conquered but also the Spanish identity. By examining the historical context and events that led to the rise and fall of the Spanish Empire, Pérez-Reverte provides insights into the legacy of Spain, highlighting the interplay between various cultures and the historical significance of its territories.