Demetrius of Liubar or Liubartas (also Lubart, Lubko, Lubardus, baptized Dmitry; died ~1383) was Prince of Lutsk and Liubar (Volhynia) (1323-1383), Prince of Zhytomyr (1363-1374), Grand Prince of Volhynia (1340-1383), Grand Prince of Galicia and Volhynia (1340-1349).
The origin of Liubartas is uncertain. It is known that he was the youngest son of Gediminas, Grand Duke of Lithuania. In the early 1320s he married a daughter of Andrew of Galicia and ruled Lutsk with Liubar (today town in Zhytomyr Oblast) in eastern Volhynia. After Andrew and his brother Lev II died around 1322, Galicia–Volhynia did not have a male successor. Instead of promoting Liubartas and causing a war with Poland, Gediminas compromised with Władysław I of Poland. Both parties agreed to install Boleslaw-Yuri II, nephew of Leo and Andrew.
Boleslaw-Yuri was a son of Trojden I of Masovia from the Piast dynasty, a cousin of Władysław I, and nephew of Gediminas' son-in-law Wacław of Płock. At the time Boleslaw was fourteen years old and was betrothed to Eufemija, daughter of Gediminas. Liubartas continued to rule Lutsk and Volodymyr-Volynskyi. That way the Galicia–Volhynia Wars were postponed until after Boleslaw's poisoning in 1340. He was poisoned by rebellious nobles, who invited Liubartas to become the ruler for both Galicia and Volhynia. Sources are too scarce to fully reconstruct events between 1341–1349.
I-I-I-I've been thinking 'bout floodbank levies
We've been talking 'bout floodmark risin'
Next time you go screechin' 'bout float-feed
I'll take steps to make you think again
Six past seven and I'm in sunshine
Smilin' at pigeons, scratchin' my chest
Some days nobody goes to work
They all come laughin' - picnic in my head
And when you look for me, I'll have taken your leopard skin
Sell it to some nightclub king who thinks he's St. Francis
Birds hangin' off his head
You've been sayin' that I don't make sense
Tellin' me you can't cope with my birdsong
You've been dishing out so much doublespeak
Spittin' out nonsense for months too long
And when you look for me, I'll have taken your leopard skin
Sell it to some nightclub king who thinks he's St. Francis
Birds hangin' off his head
Don't you feel that in some time future
Next week, last week - Over Number 88
Just when we can talk to each other
Delay the new ball and make this leopard spin
Make this leopard spin