Only a small part of the area is a building (the entrance and lobby of the cinema, close to Davaki street), the rest is the open space.
-Resize building
-Draw new area, and move the tags to it
-Add:
Davaki 18
operator=Δήμος Χαϊδαρίου
phone=2105320003
open_air=yes
outdoor_seating=backyard

new name
Πάρκο για το Παιδί και τον Πολιτισμό

open_air=yes

"There is no any castle"
The place has gone or never existed. This is an auto-generated note from MAPS.ME application: a user reports a POI that is visible on a map (which can be outdated), but cannot be found on the ground.
POI has no name
POI types: historic-castle
OSM data version: 2018-01-10T08:12:02Z
#mapsme

delete node/4802299863

node/5595240421
wild wild palaio faliro...

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nö Museum in polytexnico 8