Trakai Castle (Lithuanian: Trakų salos pilis, 'Island Castle of Trakai') is a restored castle in Lithuania, built in the Middle Ages and located on an island in Lake Galvė in Trakai National Park near the town of Trakai. Construction was started in the second half of the 14th century by Kęstutis, and was done in three phases until the early 15th century. In 1409, the castle was completed under the supervision of Vytautas the Great. He died in this castle in 1430. After the Battle of Tannenberg in 1410, the Teutonic Order, the hereditary enemy of the Polish-Lithuanian alliance, had been eliminated and the castle lost its military importance. It was used as the residence of the Grand Prince of Lithuania and later as a summer palace for the kings of Poland (who were also Grand Prince of Lithuania). The interior was decorated with frescoes; part of it has been preserved. After that, the castle served as a prison. In the wars with the Grand Principality of Moscow in the 17th century, the castle was damaged. The damage was not repaired and the castle fell into disrepair. Put Trakai Castle and Trakai other attractions into our Trakai holiday planner and see how your holiday takes shape.