It takes a few seconds for your eyes to adjust to the dim interior of Regensburg’s soaring landmark, the Dom St Peter, one of Bavaria’s grandest Gothic cathedrals with its stunning kaleidoscopic stained-glass windows and an opulent, silver-sheathed main altar. The cathedral is home of the Domspatzen, a 1000-year-old boys' choir that accompanies the 10am Sunday service (only during the school year). The Domschatzmuseum (Cathedral Treasury) brims with monstrances, tapestries and other church treasures.