Unable to answer "What kind of memorial is this?" – Memorial – https://osm.org/way/169390190 via StreetComplete 63.0:

Can't see evidence of memorial area, bench is a memorial though

Attached photo(s):
https://streetcomplete.app/p/337368.jpg
https://streetcomplete.app/p/337369.jpg
https://streetcomplete.app/p/337370.jpg