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Castle Clinton National Monument/earlier New York Aquarium (1896-1941)/earlier Emigrant Landing Depot (1855-1890)/earlier Castle Garden (1824-1855)/originally West Battery (1808-1811, renamed Castle Clinton, 1815). Lt. Col. Jonathan Williams and John McComb, Jr. Open to the public: 7-5 daily. 212-344-7220.

Until recently, one of the most vitally involved structures in the city's life and history.  Built as West Battery for the War of 1812 to complement Castle Williams across the waters on Governors Island (it never fired a shot in anger), it was originally an island fortification some 300 feet offshore, connected to Manhattan by a combination causeway bridge. Twelve years after the war it was ceded to the city.  As a civic monument it served for the reception of distinguished visitors at the very edge of the nation (General Lafayette, Louis Kossuth, President Jackson, Prince Albert).  Remodeled as a concert hall and renamed Castle Garden, it enjoyed a moment of supreme glory in 1850 as the site of the P.T. Barnum-promoted American debut of the Swedish soprano Jenny Lind.  Only five years later it was transformed into the Emigrant Landing Depot, run by N.Y. State, where some 7.7 million new Americans were processed.  Scandal led to its closure, and the processing of immigrants was transferred to federal control, at the Barge Office in 1890 and at Ellis Island in 1892.  Changed by McKim, Mead & White, it became the New York Aquarium until 1941.

It was doomed by Robert Moses' call for its demolition to build approaches for his ill-fated harbor bridge to Brooklyn -- today's Brooklyn-Battery Tunnel.  A loud civic clamor and the reported intervention of Eleanor Roosevelt miraculously saved it though it languished inside a construction fence for decades.  In 1946 the ruin was named a National Historic Monument. In 1986 it became a ticket office for the boats to National Park service attractions in the harbor.

--description of vista from the walkway atop Castle Clinton as it appeared in the New York Gazette and General Advertiser, July 3, 1824

Many New Yorkers can remember spending pleasant afternoons visiting the Aquarium, watching the incredible fish glide effortlessly through the almost invisible water. Now, as if by magic, someone has pulled the plug and taken off the lid, for the water, fish, and roof have vanished. Of course, such a transformation did not take place in the twinkling of an eye; it is the result of a dogged fight for preservation and a lengthy restoration process that has only now borne fruit.

In 1941 the doors of the Aquarium shut for good. The plan for the Brooklyn-Battery Tunnel were firm and the Aquarium stood in the way. It was an old structure that seemed to have outlived its usefulness. Powerful voices called for its demolition. A group of citizens, intrigued by the structure's history and unwilling to believe that simply because it was old, it was useless, fought to save the building. Gaining the ally of time when the United States entered World War II, they saw their efforts rewarded when Congress declared the historic structure Castle Clinton National Monument August 12, 1946. The new tunnel would be completed and the old fortress would remain. But before the building had received congressional protection, the wrecker's ball had already removed the upper story, roof, and other additions that had been added in its middle years. What was left when the National Park Service took over was the basic structure that had begun life hack in the early 19th century. In the summer of 1975, after much restoration work, Castle Clinton reopened the doors that had been shut for 34 years.

Today where fish once swam lazily, where anxious immigrants awaited entry into the land of their choice, where audiences cheered a favorite performer, and where lookouts squinted as they searched for a British invasion fleet that never came, you can learn the remarkable history of this unpretentious fortress. You can attend a concert, small community festival, a fair, or just sit on one of the benches in Battery Park, eating lunch and daydreaming about Castle Clinton in all its various manifestations. Or you can just people-watch. It's that kind of place. Enjoy it, the view, and your daydreams.

In short order five new forts were built: Fort Wood on Bedloes Island, Fort Gibson on Ellis Island, three-tiered Castle Williams on Governors Island, the South-west Battery at the tip of Manhattan Island, and the North Battery at the foot of Hubert Street.

Circular in shape, the South-west Battery stood in about 7.7 meters (35 feet) of water, 61 meters (200 feet) from shore. A timber causeway with drawbridge connected the new fort to Manhattan. The South-west Battery had 28 guns on one tier. Inside the rounded ends of the rear wall, on the land side, were the magazines. Quarters for the officers were at each side of the passageway to the causeway. No barracks for the enlisted men existed.

The South-west Battery was completed in 1811 and fired its first salute on Evacuation Day November 25, the 28th anniversary of the departure of the British from New York at the close of the American Revolution. Throughout the War of 1812 the fort stood ready, but its guns fired at nothing more dangerous than a harmless hulk moored in the river for target practice.

At the end of the war, the fort became the headquarters for the Third Military District and was named Castle Clinton in honor of DeWitt Clinton, a former mayor of New York City and later governor of New York State. In t821 the district headquarters were moved to Governors Island and Castle Clinton was closed down. Two years later, Castle Clinton was ceded to New York City.

In June 1824, Castle Clinton was leased by the city as a place of public entertainment. Opened as Castle Garden on July 3, it soon became one of the favored"places of resort" in New York. A newspaper described the interior as a "fanciful garden, tastefully ornamented with shrubs and flowers." In time, a great fountain was installed. The Garden was the setting for band concerts, fireworks, an occasional balloon ascension, and demonstrations of the latest scientific achievements. The gun rooms, decorated with marble busts and painted panoramas, became a promenade and, from boxes seating eight people, a place from which to watch the show. A more popular promenade was the top of the Garden wall, where awnings covered a 4.2-meter (14-foot) walkway. The officers' quarters became a bar selling choice liquors, confections, and ices.

From the start, Castle Garden witnessed extraordinary events. Within a month after its opening, the Marquis de Lafayette landed here at the start of a year-long triumphal tour of America. In the years that followed, many other prominent people were honored at the Garden: Presidents Andrew Jackson, John Tyler, and James K. Polk, Vice President Richard M. Johnson, Sen. Henry Clay, and the great Hungarian patriot Louis Kossuth.

In the 1840s, Castle Garden was roofed over and more serious entertainment was added to the fare. The Garden for the first time presented opera, in concert form. The 1845 season opened with Semiramide and The Barber of Seville. The Garden cellars continued to be filled, according to one newspaper, "with the most delicious fluids so that the audience may be at once regaled with the choicest Italian music, and the most inspiring mint juleps."

A memorable event occurred September 11, 1850, when P. T. Barnum presented the "Swedish Nightingale," Jenny Lind, in her American debut More than 6,000 people paid at least $3 a seat. At the close of her performance, the audience broke into a "tempest of cheers."

Castle Garden had served as a theater for more than a quarter century when its doors closed. It was not the end for the structure, just the end of an era.

On August 3,1855, Castle Garden, under lease to the State of New York, was opened as an immigrant landing depot. Only a short time before Castle Garden had been joined to the mainland by fill and fenced off from the rest of the Battery. For the first time, the bewildered immigrants were protected from the unsavory characters who had roamed the open wharves at will to take advantage of gullible newcomers. Here generally reliable information about boarding houses, travel routes, and fares could be obtained. Needed medical attention and an honest currency exchange were provided as well as a chance for employment. Between 1855 and 1889, more than eight million immigrants -- two out of every three persons immigrating to the United States in this period -- passed through the Garden.

 After 1882 as the number of immigrants gradually increased, more buildings were erected outside the Garden. Brick walls replaced the wooden fences. Then, on April 18,1890, the last immigrants went through Castle Garden. With control shifted to the U.S. Superintendent of Immigration, the Barge Office became a temporary landing depot, pending the opening of the newer, more commodious center on Ellis Island on January 1,1892.

Castle Clinton was once again altered, this time to become the New York City Aquarium. When the Aquarium opened its doors on December 10,1896, some 30,000 people poured in to see the specimens that came from the waters around New York. As the Aquarium became more popular and developed admiring friends, ship captains and yachtsmen based in New York began to collect interesting and more exotic fish from around the world for the Aquarium.

Thus the collection grew in number and variety. Many of the aquatic creatures became quite well known with the crowds. A West India harbor seal that swam effortlessly around her tank seemed to take particular delight in the audiences that she attracted and gleefully sprayed with a mouthful of water.

Once the Aquarium became a part of New Yorkers' jives, a favorite pastime on April Fool's Day was to leave a message for a fellow worker that said."Mr. Fish called. Please call him back. Whitehall 4-1560." The number was that of the Aquarium.

For the millions of visitors the fun came to an end in 1941 when the doors were closed for good. The sea creatures were taken to the Bronx Zoo and later to Coney Island.