The Three Kings - also known as Epiphany - is a traditional festival where a parade with Melchior, Caspar, and Balthazar goes through Alicante from the harbor (where they are said to have arrived).
The parade started off with minions and pop-culture characters, but it was when the first of the three kings arrived that the kids around me went wild: MELCHIOR! MELCHIOR!
, and the same for Caspar and Balthazar.
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I have an issue with the portrayal of Balthazar, though - everyone knows he looks like this.