Frutiger/Calibri like display font

Classification: 
Font: 
TheSans
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This headline and display font seemed pretty easy for me: First I thought it was a Frutiger, but the 'a' does not fit. Then I thought it was Calibri, but Calibri is rounder. Whatthefont did not help either. It seems so obvious and well known and still I have no clue what it is.

Comments

This is TheSans by Lucas de Groot. He designed Calibri, too.