'Royal' in the Bible

Then the king ordered Ashpenaz, the chief of his officials, to bring in some of the sons of Israel, including some of the royal family and of the nobles,

Twelve months later he was walking on the roof of the royal palace of Babylon.

The king reflected and said, ‘Is this not Babylon the great, which I myself have built as a royal residence by the might of my power and for the glory of my majesty?’

He will pitch the tents of his royal pavilion between the seas and the beautiful Holy Mountain; yet he will come to his end, and no one will help him.