decentred shadow

1. Does "which seeks to assert its dominance over the square day after day" imply "has always sought to assert its dominance over the square"?

2. Does "demanding from its ‘subjects’ attendant values of patriotic allegiance and unity" mean demanding its attendants (subjects) to show their respect and commitment to the values of patriotic allegiance and unity"?

3. Does "ritualised" here mean "superficial and lacking those original functions"?

4. Does "decentred shadow" intend to say "cast shadow"?

Context: (it is about a flagpole that people stand under its shadow to protect themselves from sunshine)

Paradoxically, then, this ‘national monument’, which seeks to assert its dominance over the square day after day,
majestically demanding from its ‘subjects’ attendant values of patriotic allegiance and unity, is turned implicitly into a ritualised ‘people’s monument’ in which the flagpole is still of central importance, still ‘venerated’ in a sense, but for its decentred shadow.