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who took over after the death of her husband in 1974. A key lawmaker in the 1950s and 1960s, Gueiler was asked by rival political parties in 1979 to head a government restoring democratic rule after a military coup that ousted the elected leader.
During her presidency, Gueiler came under pressure from the armed forces, bristled by the participation of left wing and center left politicians in her government. She was then ousted in an army coup in July 1980.
Gueiler later served as a diplomat and a senator before retiring from public office in the 1990s.