the world's largest single field of non-associated gas (proven gas reserves of around 250 trillion cubic feet and probable reserves of 500 trillion cubic feet), commenced. While the search for finding more oil deposits in Qatar continued, Qatar built an industrial base in order to reduce dependence on the oil sector. Dethronement and death While Khalifa bin Hamad Al Thani was staying in Geneva, Switzerland, in June 1995, his son Hamad bin Khalifa seized power in another bloodless coup d'état. Khalifa lived in France until he returned to Qatar in 2004. He died on 23 October 2016 at the age of 84. Marriages and children Sheikh Khalifa had five sons and twelve daughters from four wives. Sheikha Amna bint Hassan bin Abdullah Al Thani Sheikh Abdelaziz bin Khalifa, Petroleum and finance minister (1972–1992) Sheikha Maryem Bint Khalifa Sheikha Noora bint Khalifa Sheikha Hissa bint Khalifa Sheikha Jafla bint Khalifa Sheikha Moza bint Khalifa Sheikha Aisha bint Hamad Al Attiyah Sheikh Hamad bin Khalifa, Emir of Qatar from 1995 to 2013. Sheikha Rudha bint Jassim bin Jabr Al Thani Sheikha Aisha Bint Khalifa Sheikha Sheikha bint Khalifa Sheikh Abdullah Bin Khalifa Sheikha Amna Bint Khalifa Sheikh Mohammed bin Khalifa Sheikha Lolwa Bint Khalifa Sheikha Amal Bint Khalifa Sheikha Al Anoud bint Khalifa Sheikha Moza bint Ali bin Saud Al Thani Sheikh Jassim bin Khalifa Sheikha Nouf bint Khalifa References Thani, Khalifa bin Hamid 2016 deaths Qatari Muslims Emirs of Qatar Muslim monarchs Khalifa bin Hamad Government ministers of Qatar Prime Ministers of Qatar Finance ministers of Qatar Leaders who took power by coup Leaders ousted by a coup Honorary Knights Grand Cross of the Order of the Bath Honorary Knights Grand Cross of the Order of St Michael and St George 20th-century Arabs