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In page Countess Palatine Barbara of Zweibrücken-Neuburg:

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Countess Barbara of Oettingen studied alchemy intensively and is considered one of the most important women in the history of the field.[citation needed] She employed several alchemists and corresponded extensively on this subject with her nephew, Augustus, Count Palatine of Sulzbach.[citation needed] Barbara also performed numerous experiments for Emperor Rudolf II in his residence in Prague, until she was expelled from the court.[2]