This little church (St Archangel Michael) stands up above the centre of Trebinje, not dominating, just very visible.  I went into the Tourist Information and asked about the church, and was basically told not to visit, because it was not a tourist location: the church I should visit was the Gradine Church up on a hill across the river, or at least the Temple of the Transfiguration of Our Lord.
Well, what do you think I did?  Of course, I climbed up to St Archangel Michael (the little church) and gave Gradine a miss.

...  

When I got up there, it was really worth it for the panoramic views...
 

There was an old chap taking his ease in the shade, and after I had taken loads of photos, he showed me that I could get up higher, up to the entrance to the church (which was locked).

The only glimpse I got inside was through the lights over the doors...
...there is a Virgin and Child, both with arms outstretched - the closest I can find to this (and we can't see the infant's feet) has Jesus in a chalice, with the epithet "The Inexhaustible Cup, a Wellspring of Divine Grace"