George of Austria explained

George of Austria (Ghent, 1505  - Liège, 4 May 1557), was Prince-bishop of Liège from 1544 to 1557.^[1]

He was an illegitimate son of Maximilian I, Holy Roman Emperor and Margaretha of Edelsheim.^[2] He became Bishop of Brixen (Tyrol) between 1525 and 1537 and Archbishop of Valencia between 1538 and 1544.

In 1544 he became Prince-bishop of Liège by the influence of his nephew Charles V, Holy Roman Emperor, a post he held until his death. George strongly opposed any French influence in the Prince-Bishopric of Liège, thus maintaining the strong grip of the Habsburgs, who controlled all surrounding lands.
In 1554, he was faced with a French invasion under King Henry II of France.

Notes and References

1. J. A. Parente . Counter-Reformation Polemic and Senecan Tragedy . Humanistica Lovaniensia: Journal of Neo-Latin Studies . 1981 . 30. 978-90-6186-119-5 . 161–165 . en.
2. Book: Bietenholz . Peter G. . Contemporaries of Erasmus: A Biographical Register of the Renaissance and Reformation . Deutscher . Thomas Brian . 2003 . University of Toronto Press . 978-0-8020-8577-1 . 86 . en.