adjective
palatial
puh-LAY-shul/pəˈleɪʃl/
Grand and luxurious like a palace.
The palatial residence has marble columns and sweeping staircases.

Etymology
Latin palatium came to mean “palace” from Rome’s Palatine Hill, where emperors lived. Palatial extends the magnificence of such residences to other large, luxurious, and impressive places.
In context
it was not to be palatial private pleasure dome like those of the 19th century robber barons rather it would be a hotel a public facility
More examples
- They stayed in a palatial hotel.
- The modest cottage seemed tiny beside the palatial residence.
- She admired the room’s palatial proportions.
Forms
palatial · more palatial · most palatial