Any German royal or princely wedding is a "Gotha party". As an example, here is a selection of the guests from the wedding of Fürst Alexander of Schaumburg-Lippe, June 2007:
Schaumburg-Lippe Guest List
(can't link directly, so click on 'Special Reports', then 'Alexander and Nadja' at the bottom of the list, then 'Guestlist')