Category:Plaques referencing 1820

• Plaques referencing 1820 in Austria‎ (2 C, 6 F)
• Plaques referencing 1820 in Canada‎ (empty)
• Plaques referencing 1820 in the Czech Republic‎ (1 F)
• Plaques referencing 1820 in Finland‎ (3 F)
• Plaques referencing 1820 in France‎ (2 C, 7 F)
• Plaques referencing 1820 in Germany‎ (2 F)
• Plaques referencing 1820 in Haiti‎ (1 F)
• Plaques referencing 1820 in Hungary‎ (1 C, 15 F)
• Plaques referencing 1820 in Ireland‎ (1 F)
• Plaques referencing 1820 in Italy‎ (4 F)
• Plaques referencing 1820 in Luxembourg‎ (1 F)
• Plaques referencing 1820 in Malaysia‎ (1 F)
• Plaques referencing 1820 in Poland‎ (2 F)
• Plaques referencing 1820 in Slovenia‎ (2 F)
• Plaques referencing 1820 in Spain‎ (3 F)
• Plaques referencing 1820 in Ukraine‎ (1 F)
• Plaques referencing 1820 in the United Kingdom‎ (2 C, 3 F)
• Plaques referencing 1820 in Venezuela‎ (1 F)

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• 1820 here-was-born plaques‎ (1 C, 4 F)

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• Plaques referencing 1820 in the United States‎ (7 F)

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• Plaques referencing 1820 in unidentified countries‎ (2 F)