|1st Lord High Admiral of Sweden|
1571? 1588? – 1591?
|Succeeded by||Axel Nilsson Ryning|
|Lord High Constable of Sweden|
1591? – ?
|Preceded by||Gustaf Olofsson Stenbock|
|Succeeded by||Magnus Brahe|
|1st Governor-General of Finland|
1594 – ?
Clas Eriksson Fleming
Pargas, Sweden (now in Finland)
|Died||13 April 1597|
Pojo, Sweden (now part of Raseborg in Finland)
Baron Klaus Eriksson Fleming (Swedish: Clas Eriksson Fleming; 1535 in Pargas – 13 April 1597 in Pohja) was a Finnish-born member of the Swedish nobility and admiral, who played an important role in Finnish and Swedish history during the rise of Sweden as a Great Power. He was a trustee of kings John III and Sigismund Vasa. His wife was Ebba Stenbock.
In 1569 Fleming became a member of the Privy Council, in 1571 he was made Lord High Admiral and in 1590 Lord High Constable. As the Governor of Finland and Estonia he carried the duties of the highest authority of Finland and Estonia for the Swedish realm, next only to the king. He was a strong supporter of the legitimate king of Sweden and Poland Sigismund Vasa and therefore an enemy of Sigismund's paternal uncle, duke Charles of Sudermania, who had also laid claim to the Swedish throne. He subdued rebels of the Cudgel War in 1596–97. A civil war against Charles was however on the horizon.
While his fleet was being prepared at Siuntio in April 1597, he suddenly fell sick. Nevertheless choosing to travel to meet his wife at Perniö, he died somewhere near the church of Pohja during the night between April 12 and 13. His body was taken to Turku, which Charles IX conquered that August. Fleming's sons were executed in the Åbo Bloodbath of 1599.
When studying Swedish history of the time it is noteworthy to know there were many persons in similar position with the name Clas Fleming at the time. Clas Eriksson Flemming should not be confused with Clas Larsson Fleming (1592–1644), admiral and advisor to the king, or Klas Fleming (1649–1685), nobleman and politician.
- "Nordisk Familjebok - Riksamiral". Nordisk Familjebok at runeberg.org (in Swedish). 1916. Retrieved 2009-05-14.
- Hofberg, Herman; Frithiof Heurlin; Viktor Millqvist; Olof Rubenson (1906). "Svenskt biografiskt handlexikon - Klas Fleming". Svenskt biografiskt handlexikon at runeberg.org (in Swedish). Retrieved 2009-05-14.
- Tarkiainen, Kari (30 November 2011). "Fleming, Klaus (noin 1535 - 1597)". Kansallisbiografia. Retrieved 6 June 2020.
- Mäkelä-Alitalo, Anneli (12 November 2014). "Stenbock, Ebba (K 1614)". Kansallisbiografia. Retrieved 6 June 2020.