The sitting-room of Vytautas the Great resembles a medieval castle hall and is dedicated to Vytautas the Great. Its designer, architect , studied Gothic architecture by visiting the Malbork and Kuressaare Castles. It is the most luxurious room but also suffered the most damage during the Soviet era. The hall is decorated with seven murals by , depicting the key moments from Vytautas' life, including the victory in the Battle of Grunwald (an adaptation of "Battle of Grunwald" by Jan Matejko) and the Congress of Lutsk which declared him King of Lithuania. During the Soviet years, the murals were painted over (possibly on purpose to preserve from destruction by the Soviets) but they were restored in 2006.