© Pixabay
© Pixabay
Solar Orbiter © ESA
© ÖAW/IKT
© Honoré Bovet, L'Arbre des batailles, Brussels, KBR, ms. 9079, fol. 10v
© ÖAW/OREA
© Princeton University
© Angie D. Branson Photography
Karikatur aus der Zeitung „Der Morgen“ v. 5. April 1920, S. 8. © ANNO, ÖNB

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