What you will call the wedding taking place at the palace i.e the wedding of a queen or king, a billionaire, a well rich entrepreneur generally who spends 1000 of million to their wedding only. Obviously, it's a Royal Wedding.
A royal wedding includes a number of well-reputed guests like celebrities, high-level politicians, well-known entrepreneurs. In a royal wedding, there are generally millions of rupees invested but it's organized in a lavish way. Royal weddings are generally covered in media and they attract the media so it gets difficult for the couple to enjoy the wedding. There are a number of royal weddings that have happened in the past that were queen and kings. There are many examples of the past that explain how the royal wedding is organized and what it consists of.
In a Royal wedding, the invitation is given through 24- carat gold plated or platinum plated cards, A very special venue is decided like a palace, peoples come from different corner of worlds, There are a number of jets hired for the service transportation of guests, 1000 of dishes are made along with dessert and drinks consist of lots of stalls, etc. It's generally organized on the theme base. The wedding has some of the theme. Catering is served by reputed chefs. Wedding couples just wore the platinum embroidered dresses along with the heavy jewelry. Royal weddings are #1 wedding organized by anybody. Couples also do not receive small gifts instead they receive grand gifts.
In India, a recent royal wedding was of Mukesh Ambani's daughter while in Italy it was for Virat and Anushka, etc. These weddings have lots of guests and complete attention from the media. A royal wedding includes lots of ceremonies and events. And almost every event or ceremony has a different theme. There is too much decoration, plenty of gorgeous things that consist of the Royal Wedding.
The royal wedding is incomplete without a large fruitcake, the cake is the main symbol in the royal wedding. Generally, the cake in the royal wedding is made up of many tiers, taking lots of time for the bakers ~4-5 days. There is a special flavored cake made at a royal wedding. Each tier of the cake is placed on a gold stand as they are not traditional tiered cakes. After the wedding ceremony cake is served among the guests with a thank you note.
Photography is a generally important event in anyone's wedding so obviously in the royal wedding also, instead of at the royal wedding they hire the world's best photographer and they have each and every equipment necessary for the lavish photography. The royal wedding ends with having a family photograph from both the groom and bride side in which all the members of the family are seen.
In all these ways a proper royal wedding is arranged whose budget costs around 1000 million which is generally not affordable by normal people. A royal wedding occurs rarely I.e. 1-2 weddings in a year in the whole world.