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Frank Hochholdinger on Twitter: "Rudolf's affection for birds is little known and overshodowed by his untimely death together with his mistress Baroness Vetsera at his hunting lodge Mayerling near Vienna 🇦🇹. 4/4
Baroness Mary von Vetsera, Mistress of Crown Prince Rudolf of Austria | Unofficial Royalty
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File:Mayerling 1957.jpg - Wikimedia Commons
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