1. The Palace of the Grand Dukes of Lithuania, located in Vilnius, is a historical landmark and now serves as the National Museum of Lithuania. The palace has a rich history dating back to the 15th century when it was initially constructed as the residence for the Grand Dukes of Lithuania.

Throughout the centuries, the palace has been rebuilt and extended multiple times, showcasing a mix of architectural styles from Gothic to Renaissance to Baroque. It was also the political and cultural center of the Grand Duchy of Lithuania, one of the largest medieval states in Europe.

Visitors to the National Museum can explore a variety of historical artifacts and exhibits that showcase the history and culture of Lithuania. The palace also offers stunning views of Vilnius Old Town from its tower.

2. The working hours of the Palace of the Grand Dukes of Lithuania (National Museum) vary throughout the year, so it is recommended to check the official website for the most up-to-date information. The phone number for inquiries is +370 5 261 7995.

3. Ticket prices and transportation options can also be found on the official website. The palace is easily accessible by public transportation, as it is located in the heart of Vilnius Old Town. Visitors can use buses, trolleybuses, or simply walk to reach the museum.