The former president said his ex-wife died at her home in New York City

Ivana Trump was Donald Trump's first wife. They had three children together: Donald Jr., Ivanka and Eric Trump

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"Our mother was an incredible woman -- a force in business, a world-class athlete, a radiant beauty, and caring mother and friend," the Trump family said

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She taught her children about grit and toughness, compassion and determination," the family said

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As Eric Trump walked out of his mother's apartment building Thursday afternoon, he told reporters, "It's been a very sad day."

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Manhattan paramedics, responding to a call for cardiac arrest, found a 73-year-old woman in the Upper East Side apartment

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Ivana Trump was found unconscious and unresponsive at the bottom of a set of stairs in her apartment, according to police sources

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Ivana Trump, born Ivana Marie Zelníčková, grew up under communist rule in the former Czechoslovakia

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