A map or two, the odd painting, many, many pieces to camera from some bloke and lots of GVs. That seems to be the norm for BBC historical programmes. With a didacticism that disdains any type of discourse, the BBC's The Crusades is crude, cheap TV that makes Current TV seem high in production values.
This is dreadful, awful TV and the BBC should be ashamed of airing something that should have been shelved long before being aired. This is radio, not TV.