Kęstutis was the sole Duke of Trakai from 1342 to 1382 and Grand Duke of Lithuania, believed to rule together with his brother Algirdas, and with his nephew Jogaila.
Seal of Kęstutis
The hillfort of Senieji Trakai Castle where the wedding of Grand Duke Kęstutis and Birutė was held
Trakai Peninsula Castle built by Kęstutis
Malbork Castle, where Kęstutis was detained in 1361
Skirgaila, also known as Ivan/Iwan, was a regent of the Grand Duchy of Lithuania for his brother Jogaila from 1386 to 1392. He was the son of Algirdas, Grand Duke of Lithuania, and his second wife Uli
Skirgaila, 16th century imaginative portrait
Document with attached Seal of Skirgaila (18 June 1387)