There is currently a nice little exhibition of Urban Sketchers Potsdam at the library of the Wissenschaftspark Potsdam (until April 26th, 2019) and these are my contributions to it.
First one is the Meridianhaus near the Helmertturm, the second one is the „Haus im Wald“ („A trefoil in the woods“) of the PIK (Potsdam Institute For Climate Research).
Meridianhaus, December 2018
