Black UFO with antennas in Berlin, Germany

On June 5, 2017, a witness caught a weird picture in Berlin, Germany. On this image, we can see a dark disc-shaped UFO with antennas. What is it?

Witness statement:

While on a weekend break to berlin as a surprise 70th birthday present for my dad, i took this photo in pariser platz at 10:46am local time facing east of the fernsehturm as it's an iconic landmark of berlin, at the time i noticed nothing, heard nothing, there were plenty of people and tourists around at the time none pointing to the sky just getting on with the day as myself and my dad were. it wasn't until we were at a coffee shop by checkpoint charlie and reviewing the photos that i noticed the anomaly and showed my father. the image was taken on an iphone se and is uploaded exactly as it was taken, no filters used etc.

Source, 07th April 2019