Built at the same time as Lithuania’s conversion to Christianity in 1387, albeit with numerous radical alterations through the centuries, the vast and imposing Sts. Johns’ Church was given to the Jesuit Church in 1571 by Zygmunt II August (Žygimantas Augustas, 1520-1572). On the dissolution of the Jesuit Order in 1773, the church was handed over to the adjoining University. The present building, which contains elements of all of the major architectural styles associated with Old Town boasts an extraordinary and predominantly Gothic interior whose crowning glory is its organ of which parts date back to an organ that came from the Belarusian city of Polotsk in 1831. The organ, the largest in country and that received a complete overhaul in stages between 1974 and 2000, is used extensively in classical concerts the church is now famous for.