<Li> <P> Basilica of Sant'Andrea, Mantua </P> </Li> <P> Basilica of Sant'Andrea, Mantua </P> <Li> <P> St. Peter's Basilica with Maderno's façade and Michelangelo's Dome . </P> </Li> <P> St. Peter's Basilica with Maderno's façade and Michelangelo's Dome . </P>

Where did the main altar stand in romanesque churches