Guidobald of Thun (1616–1668) was a Roman Catholic Archbishop of Salzburg, Bishop of Regensburg, and a Cardinal.^[2]

Born on December 16, 1616, into the House of Thun, Guidobald of Thun was chosen as the Archbishop of Salzburg on February 3, 1654. He officially assumed the title of Archbishop of Salzburg on September 24, 1654, following his ordination by Cardinal Ernst Adalbert von Harrach.^[2]

Guidobald is best known for overseeing the completion of the towers, facade, and domes of Salzburg Cathedral during his time as bishop. He also commissioned the construction of Winterreitschule and the Spring on "Residenzplatz".^[3] In addition, he established a medical branch at the University of Salzburg.^[4]

On March 7, 1666, Guidobald was appointed as the Bishop of Regensburg, and exactly one year later, on March 7, 1667, he was elevated to the rank of Cardinal by Pope Alexander VII.^[5] Guidobald was officially confirmed as the Bishop of Regensburg on March 16, 1667.^[2]

On May 8, 1668, Guidobald fell through a loose board on a bridge in Hellbrunn, injuring his shin. The injury became infected, leading to blood poisoning. Shortly after, on June 1, 1668, Archbishop Guidobald passed away. He was buried in the crypt of Salzburg Cathedral.^[6]

• Guidobald in 1654
• Guidobald in 1667
• Coat of Arms of Guidobald
• Tomb of Guidobald