Dont know how old it is or what it is called, I think it could be anywhere between 5 and 10 years old, I was into the Settlers games at the time and this was sort of similar, nearly identical in the terms of buildings.
I remember that you had to do the ususal, build farms and piggerys get them slaughtered, get your flour made into bread. the purpose of this was for your armies, you had to feed your armies or they were no good in battle. (unlike settlers where you had to get gold to make them better fighters)
The buildings animation was the same as the older settlers games (not the very first ones though) where you saw them being built up from scratch. Was set in a medievel time or olde english times (like robin hood days)
I think you had heroes you could send out to discover or search or I may be thinking of the newer settler games, I'm not sure.
Apart from that I cant think of anything else as It was a demo I played