Lord Rogers was due to meet Welsh first secretary Rhodri Morgan yesterday to discuss his design for the stalled £23m Welsh assembly.
The meeting, due to be held in London, takes place just weeks before a decision is due on the future of the waterfront building.
A spokesperson for the assembly said the meeting was Morgan and Lord Rogers’ first discussion on the scheme.
She said: “Various alternatives are still being examined by Rhodri Morgan before a choice will be made in the next few weeks.”
Morgan ordered the project to be suspended in March. He has to decide whether to retain the Richard Rogers Partnership design, stay at the assembly’s temporary home in Crickhowell House or move to different premises in Cardiff.
Conservative assembly members who have labelled the scheme a “glorified fishbowl” are pressuring Morgan to ditch the Rogers design.
Richard Rogers Partnership has hit out at claims that cost overruns caused the suspension of the scheme. It said the scheme represented “extraordinary value”, despite the overall cost of the building almost doubling since it was first conceived.