On top of the "Ferdinandmarkt" shopping cart ("Einkaufscarré") opposite the Kranoldplatz, Telekom has LTE-enabled antennas, that got replaced in summer 2019 to support Band 8 and the second Band 3 carrier.
Seen from the opposite street side standing north-west-west:
Slightly more norhtern view:
Zoomed out:
Before summer 2019 it had 6 Kathrein antenna sectors, as eNB ID 111148 has, so the Band 20 sectors could be turned by 60°: