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treaty of Paris, CECA
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signature of the traties of Rome CEE.
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signature of the merger treaty: common institutions.
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accession of the UK, Ireland and Denmark CE-9.
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accession of Greece CE-10.
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accession of Spain and Portugal CE-12.
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signature of the Maastricht treaty, reunification of Germany.
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accession of Austria, Sweden and Finland UE-15
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signature of the treaty of Amsterdam.
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signature of the treaty of Nizza
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introduction of the Euro.
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accession of Poland, Hungary, Slovenia, Czech Republic, Slovakia, Lettonia, Estonia, Lithuania, Cyprus and Malta UE-25
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accession of Bulgaria and Romania UE-27
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signature of the treaty of Lisbon
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accession of Croatia UE-28
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UK exit from UE.