The church of S. Maria in Via
The church of S. Maria in Via it's famous in Rome for a miracle happened in the 1256. The story tells that a tile was floating upon the water of a well: in particular, on this tile there was painted an image of the Mother of Jesus. The well, once, was in the palace of the cardinal Pietro Capocci, who took immediately the tile into the church. The tradition tells that in this source there was a stone taken from the well that a woman used to give something to drink to Jesus. Christians can still drink the water of the well during particulary cerimony. If you want some more information post me a comment.