Marianne. Human face of the state
The symbol of the French Republic. It seems that the most beautiful logo among government agencies belongs to France. While its textual part gets updated, the emblem itself has remained almost unchanged since 1999.
It's cool that the profile is depicted by the outer stripes of the flag, and the white part has no borders at the top and bottom. It's cool that there's a woman in it, and she confidently and symbolically transitions from one environment to another. It's cool that the proportions are more elongated than the flag, giving it a sense of dynamism.
See also cool guidelines of the mark: La marque de l'État