The reconstructed Palace of the Grand Dukes of Lithuania, the former political, diplomatic, cultural center of the State, was one of the most famous in Europe in the 15th-17th centures and was demolished in the beginning of the 19th century. This Palace is excellent located just in the heart of Vilnius, within the confines of Lower Castle. Nowadays the Gothic, Renaissance and Early Baroque halls of this multifunctional Museum are ideally applicable to organize a different size and content public events, official visits, conferences, meetings, seminars, concerts, performances, receptions and other.
http://vilnius-tourism.lt/en/what-to-see/museums/palace-of-the-grand-dukes-of-lithuania/