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|Castillo San Felipe del Morro|
Bird's-eye view of
Castillo San Felipe del Morro
|Location||San Juan, Puerto Rico|
CASTILLO SAN FELIPE DEL MORRO Latitude and Longitude:
|Governing body||National Park Service|
|Designated||1983 (7th session)|
|Part of||La Fortaleza and San Juan National Historic Site|
|Reference no.||266 |
|State Party||United States|
|Region||North America and West Indies|
|Designated||October 15, 1966|
|Part of||San Juan National Historic Site|
|Reference no.||66000930 |
Castillo San Felipe del Morro also known as Fuerte San Felipe del Morro or Castillo del Morro, is a 16th-century citadel located in San Juan, Puerto Rico. 
Lying on the northeastern-most point of the islet of Old San Juan, Castillo San Felipe del Morro is named in honor of King Philip II of Spain. The fortification, also referred to as el Morro or 'the promontory,' was designed to guard the entrance to the San Juan Bay, and defend the Spanish colonial port city of San Juan from seaborne enemies.
In 1983, the citadel was declared a World Heritage Site by the United Nations in conjunction with the San Juan National Historic Site. Over two million visitors a year explore the castillo, making it one of Puerto Rico's leading tourist attractions. Facing the structure, on the opposite side of the bay, a smaller fortification known as El Cañuelo complemented the castillo's defense of the entrance to the bay. 
The construction of the citadel and its surrounding walls began in 1539 on orders of King Charles V of Spain.  The original fortress was built under the direction of conquistador Diego Ramos de Orozco and its main purpose was to defend the port of San Juan by controlling the entry to its harbor. In order to have a viable defense while the rest of the fort was being completed, a small proto-fortress was erected during the first year of construction. It is estimated that this section comprises about 10% of the whole structure. It was not till 1587, however, that engineers Juan de Tejada and Juan Bautista Antonelli drew the fort's final design, which was based on the then firmly established Spanish military fortification principles of the time. Thus, similar Spanish fortifications of the 17th to 18th centuries can be found in Cuba, Santo Domingo, the Dominican Republic, Puerto Rico, Veracruz and Acapulco, Mexico, Portobelo, ″Cartagena″ de Indias and Panama City, Panamá, Guatemala, Honduras, and many other Latin American locations which were part of the Spanish Empire during the Age of Exploration.
The military officers lead by Field Marshal Alejandro O'Reilly and Chief of Engineers, Colonel Tomás O'Daly, began to transform San Juan in 1765 into one of the most powerful plazas in the Americas. By the late 1780s, O'Daly and his military engineers had completed the modifications of El Morro giving it its present form. The construction of the wall around the city had already been completed. The largest fortification built by the Spaniards in the Americas, Castillo de San Cristóbal, had 450 cannons, used in 1797 by Captain General Ramon de Castro to arrest the 7,000 Englishmen commanded by General Ralph Abercromby. Many complex structures were added onto El Morro over the next 400 years to keep up with the new military technologies; for example, El Morro's outer walls, which were originally constructed 6 feet (1.8 m) thick, had been augmented to 18 feet (5.5 m) thickness by the end of the 18th century. Moreover, in 1680, Governor Enrique Enríquez de Sotomayor began the construction of the city walls surrounding San Juan, which took 48 years to build. The citadel was part of the Four Lines of Defense along with the Castillo San Cristóbal, the first line being formed by the San Gerónimo fortress and the San Antonio bridge. Today, El Morro has six levels that rise from sea level to 145 feet (44 m) high. All along the walls are seen the dome-covered sentry boxes known as garitas, which have become a cultural symbol of Puerto Rico itself. The Lighthouse of the Castillo San Felipe del Morro was built atop the citadel in 1843, but was destroyed during the 1898 bombardment of the city by the United States; it was replaced by the US military with the current lighthouse in 1908. Including the exterior open killing grounds, known as the glacis and esplanade, which could be dominated by cannon in the 17th and 18th centuries, El Morro is said to take up over 70 acres (280,000 m²).
During the Spanish government of the island, El Morro, also known as Castillo de San Felipe, survived several attacks from foreign powers on various occasions. In 1595, Englishman Sir Francis Drake attacked San Juan with his fleet. He failed, however, and the Spanish gunners shot a cannonball through his cabin.
In 1598, the English attacked again, led by George Clifford, 3rd Earl of Cumberland. Clifford succeeded because he attacked San Juan over land instead of trying to enter through the San Juan Bay. However, an epidemic of dysentery forced him to flee the island.
In 1625, the Dutch, led by Boudewijn Hendricksz, also attacked the island emulating George Clifford's overland invasion. To the amazement of the citizens, the invaders were able to pass in front of the castle's defenders and into the harbor, out of reach of the city's cannons. El Morro managed to resist the siege and eventually made the Dutch retire, although they were able to sack and burn the city before leaving.
In 1797, British General Ralph Abercromby and Admiral Henry Harvey, with a force of 7,000–13,000 men, invaded the island of Puerto Rico. Captain General Don Ramón de Castro and his forces repelled the attack. Abercromby and Harvey were defeated.
El Morro's last active fight occurred during a naval bombardment by the United States Navy during the 1898 Spanish–American War, ending the age of naval warfare in the Caribbean, at least in the classical sense. During the Spanish–American War, the castle was attacked at least three times by American naval forces, the largest being the Bombardment of San Juan on May 12, 1898. The war ended with the signing of the Treaty of Paris, in which Spain ceded ownership of the islands of Puerto Rico, Cuba, Guam, and the Philippines to the United States.
El Morro and many other Spanish government buildings in Old San Juan became part of a large U.S. Army post, called Fort Brooke. In the early 20th century, the U.S. military filled up the esplanade (the green space in front of "El Morro") with baseball diamonds, hospitals, officers' quarters, an officers' club and even a golf course.
On March 21, 1915, Lt. Teófilo Marxuach was the officer of the day at the El Morro fortress. The Odenwald (built in 1903 and not to be confused with the German World War II warship of the same name) was an armed German supply ship which tried to force its way out of the bay and deliver supplies to the German submarines waiting in the Atlantic Ocean. Lt. Marxuach gave the order to open fire on the ship, which was forced to return; its supplies were confiscated.  The shots ordered by Lt. Marxuach are widely regarded to be the first shots fired by the United States in World War I, although the first actual wartime shot fired by the U.S. came on the day war was declared, during the scuttling of the SMS Cormoran off Guam.
During World War II the United States Army added a massive concrete bunker to the top of El Morro to serve as a Harbor Defense Fire Control Station to direct a network of coastal artillery sites, and to keep watch for German submarines which were ravaging shipping in the Caribbean. A lighthouse, rebuilt by the U.S. Army in 1906–08 is the tallest point on El Morro, standing 180 feet (55 m) above sea level. Flagpoles on El Morro today customarily fly the United States flag, the Puerto Rican flag and the Cross of Burgundy flag, also known in Spanish as las Aspas de Borgoña, a standard which was widely used by Spanish armies around the world from 1506–1785.
In 1961, the United States Army officially retired from El Morro. The fort became a part of the National Park Service to be preserved as museums. In 1983, the Castillo and the city walls were declared a World Heritage Site by the United Nations. In honor of the Quincentennial of the voyages of Columbus in 1992 the exterior esplanade was cleared of palm trees that had been planted by the U.S. Army in the Fort Brooke era, and restored to the open appearance this "field-of-fire" for El Morro's cannon would have had in colonial Spanish times. Parking lots and paved roads were also removed, and the El Morro lighthouse repaired and restored to its original appearance. El Morro was used as a film set in the 1996 motion picture Amistad. Steven Spielberg used it to represent a fort in Sierra Leone where African slaves were auctioned in 1839. African slave labor was used in addition to local labor to help build the castillo. El Morro was a defensive military fortification and a major component of San Juan's harbor defense system. Puerto Rico as such was considered by the Spanish crown as the "Key to the Antilles"; no enemy ship could navigate its waters without fear of capture.
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- 1508 – Spanish colonized the area
- 1509 – Spanish settlers from Caparra found San Juan.
- 1539 – Construction of the first harbor defenses at El Morro and La Fortaleza authorized by King Charles V.
- 1587 – Engineers Juan de Tejada and Juan Bautista Antonelli lay out the main design for El Morro still seen today.
- 1589 – Governor Diego Menéndez begins new construction at El Morro.
- 1595 – Sir Francis Drake attacks El Morro unsuccessfully by sea. Gunners from El Morro shoot a cannonball through the cabin of Drake's flagship. To impede Drake's ships from entering the bay, a metal chain was drawn across the entrance. Drake was defeated and many of his ships sunk.
- 1598 – George Clifford, Duke of Cumberland, attacks from the land side in June of this year, the only time El Morro was taken in battle. English forces move into the fortress, however weakened by dysentery they leave in November.
- 1625 – The Dutch under the command of Captain Balduino Enrico (also known as Boudewijn Hendricksz/Bowdoin Henrick) attacked and invaded San Juan from the "La Puntilla". El Morro held out under the leadership of Spanish Governor De Haro and Captain Juan de Amézqueta of the Puerto Rican militia, but the city was sacked and burned.
- 1630 – Governor Enrique Enríquez de Sotomayor begins construction of the city walls. Work continues until 1678 to encircle the city completely.
- 1765 – After the siege of Havana in 1762 by the British, King Charles III appoints Field Marshal Alejandro O'Reilly (Alexander O'Reilly) and Royal Engineer Tomás O'Daly (Thomas O'Daly) to reform San Juan's fortifications and reorganize the garrison to make the city a "Defense of the First Order".
- 1787 – An earthquake damages the structure of both San Felipe del Morro and San Cristóbal. 
- 1797 – General Ralph Abercromby and Admiral Henry Harvey, with a force of 7,000–13,000 men, invaded the island of Puerto Rico. Captain General Don Ramón de Castro and his forces repelled the attack. Abercromby and Harvey were defeated. This was to be one of the largest invasions to Spanish territories in the Americas.
- 1825 – Well known Puerto Rican pirate, Roberto Cofresí was jailed and later executed within the fort's walls.
- 1843 – First lighthouse in Puerto Rico constructed atop the castle.
- 1898 – On 12 May, US Navy warships shell El Morro in a day-long bombardment, damaging the tip of the main battery. Six months later, Puerto Rico becomes U.S. territory by terms of the Treaty of Paris which ends the Spanish–American War.
- 1899 – The Department of the Navy rebuilds the lighthouse tower as an octagonal reinforced concrete structure using the iron structure as reinforcement. A new lenticular lens is installed. By 1906 a crack, through and around the top of the tower, directly under the lantern requires its demolition.
- 1908 – Present lighthouse seen atop El Morro built by the United States Navy.
- 1915 – First shots of World War I fired by Lt. Teófilo Marxuach on behalf of the United States. Marxuach, a native of Arroyo, Puerto Rico, fired what is considered to be the first shot of World War I fired by the regular armed forces of the United States against any ship flying the colors of the Central Powers.  Marxuach, who was a member of the "Porto Rico Regiment of Infantry" and Officer of the Day, on 25 March 1915, opened fire on the Odenwald, an armed German supply vessel, as it was trying to force its way out of San Juan's bay.
- 1942 – El Morro was still an active military post during World War II. The U.S. Army added concrete artillery observation posts and an underground bunker to El Morro to defend against possible German attacks.
- 1949 – San Juan National Historic Site is established.
- 1961 – The U.S. Army moves out of the forts of Old San Juan, and they become the jurisdiction of the United States National Park Service, to be preserved solely as museums.
- 1983 – San Juan National Historic Site declared a World Heritage Site by the United Nations.
- 1992 – El Morro's grounds are returned to their historic 18th century appearance as part of quincentennial commemoration of the discovery of Puerto Rico by Christopher Columbus when modern roadways and parking lots are removed. El Morro now generates tourism revenue by being open to tours.
- Seen on the McDougal Littell textbook ¡En español! Level 2
- Seen in Steven Spielberg's movie, Amistad
- Seen in Wizards of Waverly Place: The Movie
- Setting of Yanni Live at El Morro, Puerto Rico concerts and concert film
- Seen in the Agents of S.H.I.E.L.D. episode ...Ye Who Enter Here
- "La Fortaleza and San Juan National Historic Site". UNESCO. Retrieved November 25, 2012.
- National Park Service (2010-07-09). "National Register Information System". National Register of Historic Places. National Park Service.
- www.nps.gov National Park Service - San Juan National Historic Site - The Gibraltar of the Caribbean - Consulted el 2014-11-29
- Cummins, Thomas. "El Morro, view of walls, late 16th c. Juan de Tejada and Juan Bautista Antonelli. San Juan, Puerto Rico". Visual Culture in Spanish America. Retrieved March 25, 2018.
- CALLS ODENWALD AFFAIR AN ATTACK, The New York Times, April 7, 1915
- El Morro, San Cristobal y San Geronimo en peligro en caso de terremoto Archived January 8, 2014, at the Wayback Machine. on NoticiasOnline (6/7/2009)
- "US Naval Institute Proceedings"; "A Breach of Neutrality"; by: Lt. Isaiah Olch, US Navy; Vol. 62; July – December 1936
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