Conversation so far:
What was the European Flag proposal?
Rem Koolhaas and his think-tank AMO – an independent part of OMA – suggested the development of a visual language.
When was the European Flag proposal proposed?
The European Flag proposal was brought up around the signing of Treaties of Nice in May 2001.
What are some things Rem Koolhaas is known for?
Rem Koolhaas is the author of ‘Delirious New York: A Retroactive Manifesto for Manhattan’.
What are some other things Rem Koolhaas is known for?
Rem Koolhaas is the founding partner of OMA, and of its research-oriented counterpart AMO based in Rotterdam, the Netherlands.

Question: What color was the flag?
Self-contained rewrite: What color was the proposed European flag?