Dame Zaha Hadid has died of a heart attack at the age of 65.

The Iraqi-born, British architect passed away in a Miami hospital, where she was being treated for bronchitis – according to the BBC.

Hadid was known for her organic forms and sweeping lines in designs such as the London Olympic Aquatic Centre and the Guangzhou Opera House in China. She also conceived the 2022 FIFA World Cup stadium in Qatar and Manhattan’s 520 W 28th Street tower, which are both under construction.

Just last month, Hadid collected the RIBA’s Gold Medal – British architecture’s top prize – becoming the first woman to win the award in her own right.