Wow, this is truly awful. Is that a modesty patch sewn in at the very last second when the zipper was already closed?

BTW the zipper sure is under lots of pressure.

...

Not for modesty - imho a patch added because she didn't fit in any longer without such a patch (I guess the zipper went a bit higher previsouly).
Seriously - I appreciate that she wants to recycle even dresses not longer her size, but if THIS is how she does it ... NO.
What tailor does that that way and thinks it's OK for a Grand Duchess to enter a church on National Day with all eyes on her back ...?
And how she thought it's OK to wear that also totally escapes me.