Hello, Pieter,

I know you would love to see the Atomium showing up on the main OSM map… and we all would too.

We are aware of the problem, this is a know bug in osm-carto, documented here: https://github.com/gravitystorm/openstreetmap-carto/issues/688

There are plenty of layers that feed on OSM data, and all of them render the Atomium properly.  Only osm-carto does not.  The problem should be fixed there, not by putting incorrect data in OSM until it "looks good" in osm-carto.  This includes: playing with multipolygons to give "inner" roles to the upper spheres or splitting the pedestrian area to make it disappear under the monument → this is called "mapping for the renderer" and is not allowed on OSM.

Have a nice day.