The only use that springs immediately to mind is in the ballet music in Tannhäuser, but only in the Paris/Vienna version.
Quite right, I see them in the Dover score
The staging is inventive, a single but complex set that slides back and forth with a few small sub-pieces and very well lit.
With some advice about editing and plot clarification Wagner could have become the German Hérold. It was interesting to discover this unexpected side of the composer.