Habsburg Spain refers to Spain and the Hispanic Monarchy, also known as the Catholic Monarchy, in the period from 1516 to 1700 when it was ruled by kings from the House of Habsburg. In this period the Spanish Empire was at the zenith of its influence and power. During this period, Spain held many territories, including Pan-American continental holdings and the West Indies; European territories like the Low Countries, Italian territories, Portugal and parts of France; and the Philippines and other possessions in Southeast Asia. The period of Spanish history has also been referred to as the "Age of Expansion".
The Habsburg name was not always used by the family members, who often emphasized their more prestigious princely titles. The dynasty was long known as the "House of Austria". In some circumstances, the family members were identified by their birthplace. Thus, Charles V was known in his youth as Charles of Ghent. As king of Spain, he was known as Charles I of Spain and as emperor, Charles V (in French, Charles Quint). In Spain, the dynasty was known as the Casa de Austria, including illegitimate sons such as John of Austria and John Joseph of Austria. The arms displayed in their simplest form were those of Austria, which the Habsburgs had made their own, at times impaled with the arms of the Duchy of Burgundy (ancient), as seen on the arms of John of Austria. Calling this era "Habsburg", is, to some extent, a convenience for historians.
