'Royal' in the Bible

in those days when King Ahasuerus sat on his royal throne which was at the citadel in Susa [the capital of the Persian Empire],

Drinks were served in various kinds of golden goblets, and the royal wine was plentiful, in accordance with the generosity of the king.

Queen Vashti also held a [separate] banquet for the women in the palace of King Ahasuerus.

to bring Queen Vashti before the king, wearing her royal crown (high turban), to display her beauty before the people and the officials, for she was lovely to see.

If it pleases the king, let a royal command be issued by him and let it be written in the laws of the Persians and Medes so that it cannot be repealed or modified, that Vashti is no longer to come before King Ahasuerus; and let the king give her royal position to another who is better and more worthy than she.

So he sent letters to all the royal provinces, to each province in its own script and to each people in their own language, saying that every man should be the master and rule in his own home and that he should speak [in the household] in the language of his own people.

So Esther was taken to King Ahasuerus, to his royal palace in the tenth month, that is, the month of Tebeth (Dec-Jan), in the seventh year of his reign.

Now the king loved Esther more than all the other women, and she found favor and kindness with him more than all the [other] virgins, so that he set the royal crown on her head and made her queen in the place of Vashti.

On the third day [of the fast] Esther put on her royal robes and stood in the inner court of the king’s palace opposite his [throne] room. The king was sitting on his royal throne, facing the [main] entrance of the palace.

let a royal robe be brought which the king has worn, and the horse on which the king has ridden, and on whose head a royal crown has been placed;

He wrote [a decree] in the name of King Ahasuerus, and sealed it with the king’s ring, and sent letters by couriers on horseback, riding on the royal [mail] relay horses, the offspring of the racing mares.

Then Mordecai departed from the presence of the king in royal apparel of blue and white, with a large crown of gold and with a robe of fine linen and purple wool; and the city of Susa shouted and rejoiced.