Palatial (adjective)

1. Relating to a palace or the life of royalty.
2. Of the grand and impressive scale of a palace.

Origin:

From latin palātium, the name of the palace of the roman emperors, from proto-italic *palātijō, from proto-indo-european *péle- ("wide").

Examples:

1. The former royal family lived in a palatial estate.
2. The palatial mansion was designed with the finest materials and craftsmanship.
3. The prince and princess were accustomed to the palatial lifestyle.
4. The palatial halls were adorned with expensive works of art.
5. The guests were in awe of the palatial ballroom.