The Duchy of Estonia (, , ), also known as Swedish Estonia, () was a dominion of the Swedish Empire from 1561 until 1721 during the time that most or all of Estonia was under Swedish rule. The land was eventually ceded to Russia in the Treaty of Nystad, following its capitulation, during the plague, in the Great Northern War. The dominion arose during the Livonian War, when the northern parts of present-day Estonia — Reval (Tallinn) and the counties of , , and — submitted to the Swedish king in 1561, and in 1581. It is also colloquially known as the "good old Swedish times" () by Estonians, but this expression was not used before the following Russian rule, in the beginning of which the situation of Estonian peasantry declined rapidly; to gain the support of the German Baltic nobility, Russia gave them more power over the peasantry. Head of Dominion Governors (1561–1674) Friherre of Nynäs, from Sundholm (2 August 1561 – 27 February 1562) Klas Horn of Åminne (acting) (August 1561) Henrik Klasson Horn from Kankas (1st time) (27 February 1562 – June 1562) Svante Stensson Sture (30 June 1562 – 27 July 1564) from Lechtis (1564–1565) Henrik Klasson Horn from Kankas (2nd time) (30 January 1565 – 1568) from Mörby (November 1568 – 1570) from Lepas (9 October 1570 – 1572) Clas Åkesson Tott (6 November 1572 – 1574) Pontus De la Gardie (4 June 1574 – December 1575) from Kankas (1st time) (January 1576 – May 1578) Nilsson Hans Eriksson Finn from Brinkala (acting) (19 April 1576 – 1577) (1st time) (1 August 1577 – 1580) from Kyala (1580–1581) Göran Boije af Gennäs (2nd time) (25 April 1582 – 1583) Pontus De la Gardie (1583 – 5 November 1585) (8 November 1585 – 1588) Hans Wachtmeister (acting) (July 1588 – 13 October 1588) Gustaf Axelsson Banér from Djurshom (13 October 1588 – 1590) af Lindö (1590 – July 1592) Göran Boije af Gennäs (3rd time) (1592 – June 1600) Karl Henriksson Horn from Kankas (2nd time) (acting) (1600 – 30 January 1601) Count of Raseborg (1601 – October 1602) ... (October 1602 – May 1605) Nils Turesson Bielke (10 May 1605 – June 1605) Axel Nilsson Ryning (1605–1608) ... (1608–1611) Gabriel Bengtsson Oxenstierna (1611–1617) Anders Eriksson Hästehufvud (1617–1619) Jakob De la Gardie (July 1619 – 1622) Per Gustafsson Banér af Tussa (1622 – January 1626) Friherre