Regular guided two-hour tours of the Old Town, starting from the cathedral bell tower, are organised daily by the Vilnius Tourist Office from 15 May to 15 September. The tourist office can also organise pre-booked guided tours and offers audio guides that people can rent and listen to on their own as they walk along the streets of Vilnius. In addition, there are quite a few thematic tours - such as the 'War and Peace' tour.
Walkable Vilnius offers 23 walking tours all year round. Maps of the tours are available on Google Maps and can be downloaded via the Walkable Vilnius app.