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
Jogaila, later Władysław II Jagiełło, was Grand Duke of Lithuania beginning in 1377 and King of Poland from 1386 until his death. As Grand Duke, he ruled Lithuania from 1377 to 1381 and from 1382 to 1
Kęstutis
…Duke of Trakai from 1342 to 1382 and Grand Duke of Lithuania, believed to rule together with his brother Algirdas (until 1377), and with his nephew Jogaila (from 1377 to 1381). The name "Kęstutis" is a derivative from the old form of the name Kęstas, which is a shortened version of such Lithuanian names…
King Władysław II Jagiełło, detail of the Triptych of Our Lady of Sorrows in the Wawel Cathedral
Early coin of the Grand Duke of Lithuania Jogaila with a lion, minted at the Vilnius Mint between 1386 and 1387
Seal of Władysław II Jagiełło with his title (in Latin) as King in Lithuania, used in 1377–1386, before becoming the King of Poland in 1386
Lithuanian Denar of Jogaila (minted in 1388–1392) with Vytis (Pahonia)