My guess would be servants taking food to them ect. Who had the plague themselves and just didn't know it yet. Also it might have been in the food which might have come from a sick cook.
Another name for the plague is the black death
Black plague
the black plague
the black plague went through killing many and changing all of Italy and Europe. war and trechary was another factor because peasants wanted more land because nobles died from the plague
The Black Plague is a infectious disease.
That fateful year saw the world's population enduring what is believed to be a recurrence of the bubonic plague, also known as the Black Death or the Black Plague. It is further widely believed that the Black Death was responsible for the deaths of 38,000 Londoners that year.
The common name for bubonic plague is the Black Death.
The black plague
The black plague. The plague was transferred by rats.
It is the Black Death. (Black Plague, or Bubonic Plague)
nobles
Plague, Yersinia pestis, bubonic plague, black plague, black death, fleas, rats, middle ages.