Zaha Hadid, the Iraqi-born British architect who designed modernist, futuristic buildings acclaimed around the world, died suddenly in a Miami hospital Thursday. She was 65.

Her death was reported by British publications, such as The Guardian and the BBC, and confirmed by Hadid’s firm, according to the Associated Press.

The firm said she suffered a heart attack while being treated for bronchitis.

Hadid had been working in Miami on a luxury condo building, One Thousand Museum, a 62-story skyscraper of multimillion-dollar residences overlooking Biscayne Bay, with a palatial, two-story penthouse that will sell for up to $50 million.

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(Photo: FACUNDO ARRIZABALAGA, EPA)