Imperial Bedroom was Elvis Costello's first foray into Sgt. Pepper-style art pop/rock. It shouldn't surprise anyone that this is one of my favorite EC albums.
The name of the album "Imperial Bedroom" appears on the sleeve as IbMePdErRoIoAmL. The cover painting, titled "Snakecharmer & Reclining Octopus" by Barney Bubbles (but credited to "Sal Forlenza") is a pastiche of "Three Musicians" by Pablo Picasso, and letters on the zipper-like creatures in the upper right spell "PABLO SI".
Without further adieu, here's the cover
I couldn't find the whole album in embeddable form so here's a not so shabby track: