Here is a nice meshing of the iconographic and baroque traditions as seen in the high altar of the Venetian basilica of Santa Maria della Salute. My purpose is, however, to really just show you a rather splendid high altar.
Here is the basilica and altar decorated with festal hangings and antependium:
And here is a closeup of the impressive icon:
Finally, I would share one final view of the high altar from another angle: