Michel de Castelnau, Sieur de la Mauvissière was a French soldier and diplomat, ambassador to Queen Elizabeth I. He wrote a memoir covering the period between 1559 and 1570.
Michel de Castelnau, by Jaspar Isaac
Portrait medal of Michel de Castelnau, Sieur de la Mauvissière, by Steven van Herwijck, 1565
Mary, Queen of Scots, wrote many letters to Castelnau
Francis Walsingham was able to monitor Castelnau's correspondence
The 1583 Throckmorton Plot was one of a series of attempts by English Roman Catholics to depose Elizabeth I of England and replace her with Mary, Queen of Scots, then held under house arrest in Englan
Mary, Queen of Scots, ca 1578