Jacob De la Gardie, Estonian-Swedish soldier and politician, Lord High Constable of Sweden (b. 1583)
Field Marshal and Count Jacob Pontusson De la Gardie (Reval, 20 June 1583 – Stockholm, 22 August 1652) was a statesman and a soldier of the Swedish Empire, and a Marshal from 1620 onward.He was Privy Councilor from 1613 onward, Governor of Swedish Estonia in 1619–1622, Governor-General of Livonia in 1622–1628 (conquered by the Swedish Empire in 1621, and referred to as Swedish Livonia in 1629–1721), and Lord High Constable from 1620. He introduced reforms based on the then novel Dutch military doctrine into the Swedish army. He commanded the Swedish forces in Russia and against the Polish–Lithuanian Commonwealth. He also served as one of the five regents jointly ruling Sweden during the minority of Queen Christina.