Complex sentence: Two important historical events have dramatically reshaped Berchtesgadener Land in recent years, namely Austria's signing of the Schengen treaty in 1990 and the introduction of the Euro in 2002 in both Germany and Austria.
Split into simpler sentences: Two important historical events have dramatically reshaped Berchtesgadener Land in recent years. It was Austria's signing of the Schengen treaty in 1990 and the introduction the Euro in 2002 in both Germany and Austria.