- en.wikipedia.org File:Johann Georg I Saxony.jpg
- wiki2.org ru/Файл:Johann_Georg_I_Saxony_jpgКраткое описание. Лёйкс, Франс: John George I/Johann Georg I., Prince-Elector of Saxony wikidata:Q50325047 reasonator:Q50325047.
- en.numista.com catalogue/ruler.php…
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- global.museum-digital.org people/5239
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