The Vilnius University (Vilniaus Universitetas) grounds serve as a rich architectural document of the university's history over centuries. You can stroll 13 different courtyards, admire Baroque, neoclassical, and Renaissance-styled buildings, and visit the country's oldest public library. The historic complex—known as the Vilnius University Architectural Ensemble—is open to the public all year round.
You pay a nominal fee if you want to explore on your own, while Vilnius bike tours, sightseeing tours, and private walking tours typically visit the university. Official guided tours are best if you want increased access to the library, Rector's Hall, and the Faculty of Philology. Beyond the architecture, you shouldn't miss St. John‘s Church. After paying a small fee to enter, you get a convenient elevator ride up the tower for outrageous views.