Michael, Caesar of the Peaceful Empire and Governor of Carthago Nova, was kind enough to send me an excel chart and a saved game which feature a palace block that he has devised. It's an attractive block and looks like it would be a useful addition to a city builders toolkit.
The excel chart must, of course, be viewed with (duh!) Excel or a free Excel viewer which can be downloaded from: download.com. You can download the chart here
If you want the saved game (Valentia) you can get it here.