Principality of Reuss-Greiz

Principality of Reuss-Greiz
(1778–1848)
Fürstentum Reuß-Greiz

Principality of the Reuss Elder Line
(1848–1918)
Fürstentum Reuß älterer Linie
1778–1918
Flag of Reuss-Greiz
Flag
of Reuss-Greiz
Coat of arms
Motto: Ich bau auf Gott 
(German for 'I build on God')
Anthem: Gott, erhalt in deiner Gnaden unsern Fürsten, deinen Knecht
"God, preserve in your grace our prince, your servant"
Reuss-Greiz within the German Empire
Reuss-Greiz within the German Empire
Reuss-Greiz within Thuringia
Reuss-Greiz within Thuringia
CapitalGreiz
GovernmentPrincipality
Prince 
• 1778–1800
Heinrich XI
• 1800–1817
Heinrich XIII
• 1817–1836
Heinrich XIX
• 1836–1859
Heinrich XX
• 1859–1902
Heinrich XXII
• 1902–1918
Heinrich XXIV
Minister of State 
• 1782–1833
Franz von Grün (first)
• 1901–1918
Ernst von Meding (last)
History 
• Established
12 May 1778
• Disestablished
11 November 1918
Preceded by
Succeeded by
Imperial County of Reuss
People's State of Reuss
Today part ofGermany

The Principality of Reuss-Greiz (German: Fürstentum Reuß-Greiz), officially called the Principality of the Reuss Elder Line (German: Fürstentum Reuß älterer Linie) after 1848, was a sovereign state in the German Empire, ruled by members of the House of Reuss. The Counts Reuss of Greiz, Lower-Greiz and Upper-Greiz (German: Reuß zu Greiz, Untergreiz und Obergreiz) were elevated to princely status in 1778 and thereafter bore the title of Prince Reuss, Elder Line, or Prince Reuss of Greiz.

Similarly to the more numerous Reuss Junior Line, the male members of this house were all named "Heinrich", in honour of Emperor Heinrich VI, who had benefited the family. They were numbered sequentially by birth, rather than by reign, with the last series beginning with Heinrich I (born 1693) and ending with Heinrich XXIV (1878–1927).

The territory had an area of 317 km2 and over 72,000 inhabitants in 1910.

Reuss-Greiz preserved the Frankfurt Parliament flag, which later became the flag of Germany.