There is a similar building in Oberneustift in Northern Austria (county Niederösterreich) which is also puzzling the archeologists. You can have a look at it:
http://images.google.at/imgres?imgurl=http://www.sagen.at/doku/tanja/images/pyramide.jpg&imgrefurl=http://www.sagen.at/doku/tanja/pyramide.html&h=384&w=580&sz=124&tbnid=E6kV1LMQ7v9YkM:&tbnh=87&tbnw=132&hl=de&start=1&prev=/images%3Fq%3DPyramide,%2BOberneustift%26svnum%3D10%26hl%3Dde%26lr%3D%26sa%3DN
Oliver [email protected]
Something is not right. This message is just to keep things from messing up down the road