This commemorative plaque was unveiled on May 21, 2014 as part of the 100 years of Leica photography celebration and the Leitz-Park Opening Festival. See more pictures from the event in the Leitz-Park Opening Festival album on Facebook.
The picture taken from this location in the Wetzlar Eisenmarkt, of course - is this one, taken in 1913 with the Ur-Leica:
