<Li> <P> Mater misericordie, today in San Marco in Florence </P> </Li> <P> Mater misericordie, today in San Marco in Florence </P> <Li> <P> Mosaic, today in the Museo Barracco </P> </Li> <P> Mosaic, today in the Museo Barracco </P>

When was the first st peter's basilica built