'Fantasy Europe' the basis of all uninspired fantasy worlds, (who crib from the inspirational Tolkien) would be fine. A mostly agrarian society, interspersed with cities would be fine. I'm personally a fan of having the kingdom close to or with access to the ocean. Maybe it's a Mediterranean ocean type deal, with the water surrounded by other landmasses? That way we could have a convenient excuse for wacky foreigners, they just came off the boat.