That would make more sense! I was misreading this article: https://architecturetoday.co.uk/learning-from-venturi-scott-...

Thanks for the correction!

which of those are the 'two large columns in the foyer'?

I have no idea, there is a severe lack of graphic context in these articles about a specific architectural detail. In the original article it looks like people are standing by the column the letter was found in.

Yeah it's insane that they have an article about these columns and don't show which ones it is prior to showing the people next to the deconstructed one without any context of where they are located.

No, that's up on the first floor. The "unnecessary columns" were the ones in the foyer on the ground floor.