Cruz de Borgoña
During the Spanish colonization of the Americas the Cross of Burgundy served as the flag of the Viceroyalties of the New World ("Bandera de Ultramar") and as a recurrent symbol in the flags of the Spanish armed forces and the Spanish Navy. Nations that were once part of the Spanish Empire consider "las aspas de Borgoña"" to be a historical flag, particularly appropriate for museum exhibits and the remains of the massive harbor-defense fortifications built in the 17th–18th centuries. At both San Juan National Historic Site in Puerto Rico, and at Castillo de San Marcos National Monument in St. Augustine, Florida, the Cross of Burgundy is daily flown over the historic forts, built by Spain to defend their lines of communication between the territories of their New World empire. The flying of this flag reminds people today of the impact Spain and its military had on world history for over 400 years. It was also used by Spanish military forces.