Álvaro de Figueroa y Torres-Sotomayor, 1st Count of Romanones was a Spanish politician and businessman. He served as Prime Minister three times between 1912 and 1918, president of the Senate, president of the Congress of Deputies, Mayor of Madrid and many times as cabinet minister. He belonged to the Liberal Party. Romanones, who built an extensive political network, exerted a tight control on the political life of the province of Guadalajara during much of the Restoration period. He also was a prolific writer, authoring a number of history essays.

Eduardo Dato e Iradier was a Spanish political leader during the Spanish Restoration period. He served three times as Spanish prime minister: from 27 October 1913 to 9 December 1915, from 11 June 1917 to 3 November 1917, and from 28 April 1920 until his assassination by Catalan anarchists. Also he held eleven cabinet ministries, and was four times president of the Spanish Congress of Deputies.