Berlin Potsdam anniversary #1

The Berlin – Potsdam railroad line was launched in September 1838 as the first Prussian line. Following Nürnberg-Fürth (1835), Dresden-Leipzig (1837) it was the 3rd operational line in Germany. This year we celebrate its 170 anniversary.
Well - some archaeology: What is remaining und what is still visible?
Let me start here with the railroad workers settlement of Lichterfelde West. This four building settlement was raised in the late 1870ties for the rail workers of Prussian Railroad. This settlement survived the years in a really fine condition.