Greece recognizes the dual citizenship and there is no restriction to this.
How can I get dual citizenship through a Greek Golden Visa?
I am interested in becoming a Greek Golden Visa recipient through a real estate purchase. Eventually, I would like to become a new Greek citizen. However, I come from the Middle East, where some countries don’t allow people to become citizens or hold their original country’s passport. Is this the case with Greece? Are there any exceptions made or rules about nationality I should be aware of?
In Greece you could keep your dual or multi-nationalities, but you couldn't obtain more than one EU member-state nationality.
Please be aware that there are no restrictions in obtaining a Golden Visa in Greece, even if you come from the Middle East.