Niall Ó Glacáin, or Nellanus Glacanus (c. 1563–1653) was an Irish physician who worked to treat victims of bubonic plague outbreaks in various places throughout Europe.
Niall Ó Glacáin, or Nellanus Glacanus (c. 1563–1653) was an Irish physician who worked to treat victims of bubonic plague outbreaks in various places throughout Europe. (en)