Marble etching by R.G.Karlic last supper picture

Hi, My name is Anna at Jazzbass981@comcast.net I have a Marble etching made by R.G.Karlic it's of the last supper it's big . I don't know anything about this person or what it may be worth, can anyone please help me find more information about this item. Thank you -Anna.
P.S. If you do know anything can you please email me at Jazzbass981@comcast.net this is just easier for me, but if you want to comment on this site that is just fine also. I thank you for your time!