Sacred Destinations Destinations Germany Bonn Doppelkirche Schwarzrheindorf Doppelkirche Schwarzrheindorf Photos 22120 × share full URL share short URL embed link code photo 3 of 10 Previous | Next Mural of St. Mark Evangelist on Pillar in Apse Mural of St. Mark the Evangelist on a pillar in the apse. Credit: Holly Hayes