The Anthem of Martinique
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As part of France, Martinique is part of the European Union, and its currency is the euro. Its official language is French, although many of its inhabitants also speak Antillean Creole (Créole Martiniquais). Martinique is pictured on all euro banknotes, on the reverse at the bottom of each note, right of the Greek ΕΥΡΩ (EURO) next to the denomination.
Like all departments of France, whether within metropolitan France or overseas (like Martinique, located in the Caribbean), "La Marseillaise" is used as the national anthem. (Unlike other nations with second-level administrative areas, French departments are less likely to adopt unofficial regional anthems.)
Above is an envelope with a stamp of Rouget de Lisle from Romania.