Unable to answer "What diameter is specified on the sign for this fire hydrant?" – Pillar Fire Hydrant – node/1604496537 via StreetComplete 62.2:

H100

Attached photo(s):
https://streetcomplete.app/p/326862.jpg

Hier steht ein Hydrant ohne h Schild

via StreetComplete 62.2

Hier steht eine Bank ohne Lehne

via StreetComplete 62.2

In context of overlay "Things" – Bench – node/6343377760 via StreetComplete 62.2:

Hier stehen zwei sitzbänke

This is the meeting place of the Konstanz Scout Guild of the VCP Konstanz Stamm Jan Hus. However, there is no category such as clubhouse/club meeting place.
#CoMaps android 2026.02.09-4-FDroid

This is the meeting place of the Allensbach Scout Guild of the VCP Konstanz Stamm Jan Hus. However, there is no category such as clubhouse/club meeting place.
#CoMaps android 2026.02.09-4-FDroid

"In Addition to Bus line R65, bus line 61 also departs from this bus stop"
OSM snapshot date: 2026-01-25T13:04:34Z
POI name: Ravensburg Bahnhof Bussteig 8
POI types: public_transport-platform highway-bus_stop wheelchair-yes amenity-bench highway-pedestrian-area
#organicmaps ios 2026.01.28-11-ios

"Service does not exist anymore"
The place has gone or never existed. A user of Organic Maps application has reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2026-01-25T13:04:34Z
POI name: tws.mobil E-Bike-Station
POI types: amenity-bicycle_rental
#organicmaps ios 2026.01.28-11-ios

"Small correction to my previous edit"
OSM snapshot date: 2026-01-22T18:08:18Z
POI name: Wohlgefühl
POI types: entrance organic-only wheelchair-yes shop-convenience
#CoMaps android 2026.02.09-4-FDroid

way/1463930609/history has building = 5

What this tag means? Numeric value is unexpected here and it is unclear what it means