The interior of Saints Peter and Paul Church is also worth seeing yet a bit austere contrasted to the exterior. At one end of the nave is a high altar beneath a semi-dome. In the center is a full dome with light radiating from the windows. At the other end is this pipe organ embellished with a crystal chandelier and golden cherubs. Saints Peter and Paul Church hosts spectacular classical concerts four nights a week from May through October. Typically featured is the Kraków Chamber Orchestra playing famous music from European master composers. Sometimes this magnificent organ is the only instrument.