Unknown men targeted the French Institute in central Athens daubing red paint on the entrance of the building on Sina Street, in Kolonaki, before escaping on motorcycles.
The incident occurred shortly after 10 p.m. on Wednesday. French President Emmanuel Macron, who arrives in Athens Thursday, is expected to visit the institute on Friday.
Police are investigating the incident.
The building has been repeatedly targeted by anarchist arsonists protesting French policies.