There is no legislature as such.
The Advisory Council of 30 elected members and 3 members appointed by the Council of Ministers aids the emir.
1868-1876 Muhammad bin Thani
1876-1905 Ahmad I
1960-1972 Ahmad II ibn Ali
1972-1995 Sheikh Khalifah ibn Hamad Al Thani
1995 now Sheikh Hamad ibn Khalifah Al Thani
1960-1995 Sheikh Khalifah ibn Hamad Al Thani
1995-1996 Sheikh Hamad ibn Khalifah Al Thani
1996-2007 Sheikh Abdullah ibn Khalifah Al Thani
2007 now Sheikh Hamad ibn Jassim ibn Jabr