Just throwing out a few ideas in anticipation of Beyond the Sword. I've not really thought of the characteristics of each... just throwing out some names. Irish Monastery... replaces Alchemist, no particular religious requirement. Saxon Burgh... replaces Town Square. Norman Castle Legion Fort... for Romans, replaces wooden walls. Byzantine Theme... replaces Court Ribat... Moors? Replaces Town Square. Caravanserai... Arabs? Replaces market Italian Bank... seems a natural Papal States... something to do with Inquisition, perhaps. or Canonical Court to replace Court. Of course, Beyond the Sword also has some of its own, we can use such as the Viking and Mongol UBs, and perhaps the Celt for the Scots.