Castle Clinton
Listen at the stop, then read the transcript and follow the sources behind the story.
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Transcript
Castle Clinton began life offshore. Built between 1808 and 1811 on a small artificial island, the circular fort was part of New York Harbor’s defensive system during an era of tension with Britain. Landfill later joined it to Manhattan, a useful reminder that even the shoreline here is historical construction.
After its military role faded, the building became an entertainment venue called Castle Garden. In 1855 it took on a far more consequential function as New York State’s immigrant processing station. Roughly eight million immigrants passed through Castle Garden before the federal government opened Ellis Island in 1892.
The building later served as the New York City Aquarium before twentieth-century redevelopment threatened it. Preservation campaigns saved the structure, and it eventually became Castle Clinton National Monument.
One round building therefore records several versions of New York: defensive port, mass-entertainment city, immigrant gateway, aquarium metropolis and preservation battleground.
Look toward the harbor. The waterline you see is not the Dutch waterline, the revolutionary waterline or even the early nineteenth-century one. Manhattan expanded physically by filling shallows and extending streets into former water. Before we discuss who owned this island, remember that even the island’s edge has been repeatedly renegotiated.