@analovestowrite and
@Miranda_J You are both right. This is the Engrossers Scripts which is the more decorative version of the original Copperplate or English round hand.
Well it is quite interesting invitation from Emanuel Macron to someone to a participation ceremony or a party. ( They don't call those things as Parties but ceremony when they are done by the politicians
)
But there no signature here .
I have referred the writing to a Zanarian Manuel PDF I have. True I was also bit confused it French round hand as those scrips are really 'round ".
This hand is really a hardcore calligraphy as it needs real lot and lots of training and practice. Copperplate and the Engrosser's scrips is the most hi-end calligraphy for me. The most beautiful and the must do " lettering " in the discipline of Calligraphy.