Regalia

At the convocation, all the faculty and deans wore their doctoral regalia and octagonal hats.

THE INTHRONIZATION. The King ascended the Theatre, accompanied by the two Bishops his Supporters, the Great Officers of State, the Lords carrying the Swords, and the Lords who had borne Their Majesties' Regalia, and was Inthroned by the Archbishops, Bishops, and the other Peers, who then stood about the steps of the Throne.

to be dressed in full regalia (dressed up)

[…] the throngs included tribes of American Indians celebrating […] like victorious conventioneers in their burnished regalia at a hotel party Monday night.

c. 1685-1686, Charles Cotton, the Essays of M. de Montaigne After having a long time treated their Prisoners very well, and given them all the Regalia's they can think of, he to whom the Prisoner belongs, invites a great Assembly of his Kindred and Friends

I have taken care that there's both brandy and whiskey nicely stowed away in the barrack-room, with plenty of prime regalia cigars[…]

The quantity of regalias imported into northern ports is comparatively small.