Twilight rarely held royal reunions inside her palace , thinking it'd be too small for all the royals and rulers of equestria. However, since the disseapearance of Celestia, ties with other non-pony cultures has been tense. There for, Twilight thought to be appropriate to held a royal gathering at her palace. Her daughter, Orchid Charm, being herself , decided to give tours to her guests and would often mention how The Friendship Castle was way more meaningfull and historicly more impactful than Cantorlot's or the Cristal Empire's. Making Flurry Heart furious and eventually start a fight.