The article explores how Roman law influences current international law, focusing on the concepts of occupation and acquisitive prescription. It examines whether the International Court of Justice has used Roman law rules and concepts in its decisions. Roman law may have directly influenced early international law, indirectly impacted modern legal systems, and still be relevant today as a timeless and universal source of inspiration. The analysis is centered on how Roman law analogies are applied to the occupation of unclaimed land and acquisitive prescription.