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History
The Spanish explorer Juan Ponce de León founded Puerto Rico's first settlement at nearby Caparra in 1508. In 1521, the settlement moved across the bay to its present site, and the city of San Juan was founded. Its El Morro fortress repelled various attacks, although the English (in 1598) and the Dutch (in 1625) temporarily took control. San Juan became an important port in the 18th and 19th centuries. During the Spanish-American War (1898), it
passed to US control.
Blue stands for water and rain. Black and white represent the racial harmony of the people. Effective date: 30 September 1966.
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