Simple, but works well!

Never seen a graveyard like this in real life....
Small note: you also get a nice (Christian) cross if you also make a frame + the upper third in the background color.

How do you put the cross on the banners?

@ToaStar
http://minecraft-de.gamepedia.com/Banner  > there everything is explained

I find now not so bad, as the rating is currently (28 %). Fits most likely to the crusaders. So if you build ne crusader castle at the church fit the then well, I think

I'm okay. 
Give another like

The graves are made of wood, which means that the coffins are not buried.
This cemetery is definitely not going to smell pleasant.