<Tr> <Th> Children </Th> <Td> Sunethra Chandrika Anura </Td> </Tr> <Tr> <Th> Residence </Th> <Td> Horagolla Walauwa </Td> </Tr> <P> Sirima Ratwatte Dias Bandaranaike (Sinhalese: සිරිමා රත්වත්තේ ඩයස් බණ්ඩාරනායක, Tamil: சிறிமா ரத்வத்தே டயஸ் பண்டாரநாயக்கே; 17 April 1916--10 October 2000), commonly known as Sirimavo Bandaranaike, was a Sri Lankan stateswoman . She became the world's first female head of government when she became Prime Minister of Sri Lanka, serving three terms 1960--1965, 1970--1977 and 1994--2000 . </P> <P> The widow of S.W.R.D. Bandaranaike, she filled the leadership void created in the Sri Lanka Freedom Party (SLFP) after his assassination . As Prime Minister, she moved Ceylon towards embracing a socialist of economy and undertook major constitutional changes that resulted in the island becoming a republic . An advocate of the Non-Aligned Movement, she developed and maintained strong international relations . </P>

Who was the first woman to became the prime minister of a country