1538Centuries: 15th century - 16th century - 17th century
- Treaty of Nagyvarad. Peace between King Ferdinand and the Turks. John Zapolya is recognized as King of Hungary, while Ferdinand retains the northern and western parts of the Kingdom, and is recognized as heir to the throne.
- October 31 - Caesar Baronius, Italian cardinal and ecclesiastical historian
- Truce of Nice - Peace between Emperor Charles V and Francis I of France
- July - Diego De Almagro\n