Looking East from my attic window, over the rooftops of Hochspeyer to the edge of the state forest beyond. Hochspeyer is surrounded by the northern end of the Naturpark Pfälzer Wald (Nature Park Rhineland-Palatinate Forest). I do not have a clue about the purple tree. A nice couple lives across the street and I will ask them about their tree as soon as I speak German a little better.
