Humoristic cartoon from Puck on the establishment of diplomatic relations between Greece and Persia. In 499 BC, the Persian Achaemenid Empire tried unsuccessfully to conquer various ancient Greek city-states. Finally in 449 BC a de facto peace was concluded and the Greco-Persian Wars effectively ended, but the two sides refused to have any relations. In 1902, Mozaffar ad-Din Shah of Persia and George I of Greece agreed to de jure recognition and after 2393 years established diplomatic relations.
Samuel D. Ehrhart, Public domain, via Wikimedia Commons. View source.