1614 A.D. Csejte Castle, Kingdom of Hungary

This castle was the home of the infamous Hungarian noblewoman Erzsébet Báthory (better known internationally as "The Blood Countess"). Báthory is known to have abducted and killed hundreds of Hungarian, German, and Slovak girls through torture and is rumored to have subsequently bathed in their blood (leading to rumors that she was a vampire). She was eventually imprisoned in Csejte Castle (now Čachtice Castle, Slovakia) by order of King Mátyás and was eventually discovered dead in 1614. The following is an account of her during her imprisonment written by a guard known as István Várri that was discovered in the historical archives of Budapest.

The countess looked fiercely at me and growled. This reprehensible creature had a bloodthirsty look in her eyes and moaned in a bloodcurdling way. Perhaps this was God punishing her for all the virgins whose blood she'd bathed in. That being said, this kind of punishment would've been much too cruel. This had to be the work of the Devil, sucking her down to hell. Chunks of black gunk dripped from her mouth; perhaps her blood has become contaminated by her evil. May God have mercy on our souls.

The accuracy and reliability of this account are highly questionable as Báthory was recorded as just being kept in her room for three years and given food through slits in the wall and was eventually found dead on August 24th, 1614. On top of this, the accounts that she bathed in the blood of her victims is also heavily contested. That being said, if Báthory really did bathe in the blood of young girls, then there is the remote possibility that she contracted Solanum at point and the disease may have remained hidden in her body as it would take time for the virus to travel to her major blood vessels. While this doesn't explain why none of the guards were bitten by the countess, it may explain why she was found dead face down on the floor and with several plates of food untouched (though Várri's account is still highly questionable). It is also possible that Báthory really did turn into a zombie and that this may've been the inspiration for the many modern myths that she was a vampire.