1. Vilnius Old Town (Vilniaus Senamiestis) is the historical center of Vilnius, the capital of Lithuania. It is one of the largest surviving medieval old towns in Northern Europe and is a UNESCO World Heritage Site. The Old Town is known for its charming narrow streets, Gothic, Renaissance, and Baroque architecture, churches, and historical landmarks such as the Gediminas Tower, Cathedral Square, and the Gate of Dawn. It also houses numerous museums, galleries, shops, cafes, and restaurants.

2. The Old Town of Vilnius is open to visitors year-round, 24/7. Individual attractions within the Old Town may have varying opening hours. It is recommended to check the specific opening hours of each attraction you wish to visit. For general information, you can contact the Vilnius Tourist Information Center at +370 5 262 9660.

3. Most of the Old Town of Vilnius is free to explore on foot. However, there may be entrance fees for specific attractions such as museums and churches. Public transportation in Vilnius is convenient and includes buses, trolleybuses, and trams that provide easy access to the Old Town. Additionally, taxis and ridesharing services are available in the city.