Vatican Observatory
Originally based in the Roman College of Rome , the Observatory is now headquartered in Castel Gandolfo , Italy and operates a telescope at the Mount Graham International Observatory in the United States . 
<triplet> Roman College <subj> Rome <obj> located in the administrative territorial entity <triplet> Castel Gandolfo <subj> Italy <obj> country <triplet> Mount Graham International Observatory <subj> United States <obj> country