Louis II of Hungary in the context of "Croatia in the union with Hungary"

The Battle of Mohács (Hungarian: [ˈmohaːt͡ʃ]; Hungarian: mohácsi csata, Turkish: Mohaç Muharebesi) took place on 29 August 1526 near Mohács, in the Kingdom of Hungary. It was fought between the forces of Hungary, led by King Louis II, and the invading Ottoman Empire, commanded by Suleiman the Magnificent and his grand vizier, Pargalı Ibrahim Pasha. The Ottomans achieved a decisive victory through superior planning, firepower, and a well-executed encirclement that overwhelmed the Hungarian forces.

The Hungarian army, encouraged by the nobility to engage prematurely, launched a frontal assault that collapsed under coordinated Ottoman counterattacks. King Louis and much of the Hungarian aristocracy were killed, resulting in the destruction of the royal army and the end of the Jagiellonian dynasty in Hungary and Bohemia. The aftermath saw the partition of Hungary between the Ottoman Empire, the Habsburg monarchy, and the Eastern Hungarian Kingdom in 1541.

The siege of Vienna, in 1529, was the first attempt by the Ottoman Empire to capture the city of Vienna in the Archduchy of Austria, part of the Holy Roman Empire. Suleiman the Magnificent, sultan of the Ottomans, attacked the city with over 100,000 men, while the defenders, led by Niklas Graf Salm, numbered no more than 21,000. Nevertheless, Vienna was able to survive the siege, which ultimately lasted just over two weeks, from 27 September to 15 October 1529.

The siege came in the aftermath of the 1526 Battle of Mohács, which had resulted in the death of Louis II, King of Hungary, and the descent of the kingdom into civil war. Following Louis' death, rival factions within Hungary selected two successors: Archduke Ferdinand I of Austria, supported by the House of Habsburg, and John Zápolya. Zápolya would eventually seek aid from, and become a vassal of the Ottoman Empire, after Ferdinand began to take control of western Hungary, including the city of Buda.

The Kingdom of Croatia (Croatian: Kraljevina Hrvatska, Hrvatsko Kraljevstvo; Hungarian: Horvát királyság; Latin: Regnum Croatiae), also known with full diplomatic name Kingdom of Croatia and Dalmatia (Latin: Regnum Croatiae et Dalmatiae), entered a personal union with the Kingdom of Hungary in 1102, after a period of rule of kings from the Trpimirović and Svetoslavić dynasties and a succession crisis following the death of king Demetrius Zvonimir.

With the coronation of King Coloman of Hungary as "King of Croatia and Dalmatia" in 1102 in Biograd, the realm passed to the Árpád dynasty until 1301, when the (male) line of the dynasty died out. Then, kings from the Capetian House of Anjou, who were also cognatic descendants of the Árpád kings, ruled the kingdoms. Later centuries were characterized by conflicts with the Mongols, who sacked Zagreb in 1242, competition with Venice for control over Dalmatian coastal cities, and internal warfare among Croatian nobility. Various individuals emerged during the period, such as Paul I Šubić of Bribir, who was representing the most powerful Croatian dynasty at the time, the Šubić noble family. These powerful individuals were on occasion able to de facto secure great deal of independence for their fiefdoms. The Ottoman incursion into Europe in the 16th century significantly reduced Croatian territories and left the country weak and divided. After the death of Louis II in 1526 during the Battle of Mohács and a brief period of dynastic dispute, both crowns passed to the Austrian House of Habsburg, and the realms became part of the Habsburg monarchy.

The Hungarian–Ottoman wars (Hungarian: magyar–török háborúk, Turkish: Macaristan-Osmanlı Savaşları) were a series of battles between the Ottoman Empire and the medieval Kingdom of Hungary. Following the Byzantine Civil War, the Ottoman capture of Gallipoli, and the inconclusive Battle of Kosovo in 1389, the Ottoman Empire was poised to conquer the entirety of the Balkans. It also sought and expressed desire to expand further north into Central Europe, beginning with the Hungarian lands.

Since 1360s Hungary confronted with the Ottoman Empire. The Kingdom of Hungary led several crusades, campaigns and carried out several defence battles and sieges against the Ottomans. Hungary bore the brunt of the Ottoman wars in Europe during the 15th century and successfully halted the Ottoman advance. The Ottomans won a significant victory at the Battle of Varna in 1444, but suffered a defeat at the 1456 Siege of Belgrade. One notable figure of this period was Vlad the Impaler, who, with limited Hungarian help, resisted Ottoman rule until the Ottomans placed his brother, Radu the Handsome, on the throne of Wallachia. Ottoman success was once again halted at Moldavia due to Hungarian intervention, but the Turks finally succeeded when Moldavia and then Belgrade fell to Bayezid II and Suleiman the Magnificent, respectively. In 1526 the Ottomans crushed the Hungarian army at the Battle of Mohács, where King Louis II of Hungary and more than 20,000 of his soldiers died.

Hans Krell (c. 1490 – 1565 or 1586), also Krehl ou Kreil, was a German painter of the Renaissance, mainly known as a portrait painter. He is thought to have been born in Crailsheim or Ansbach, and died in Leipzig.

Hans Krell started his career as court painter of George the Pious, Margrave of Brandenburg-Ansbach in Ansbach. He then entered into the service of King Louis II of Hungary in Prague and Buda, where he was employed as court portraitist in the years 1522–1526. He is later recorded in Leipzig (from 1531) and in Freiberg in Saxony (since 1534). Krell was known as the Fürstenmaler (Painter of Princes) in service of the German Princes – Albrecht of Brandenburg-Ansbach, Duke in Prussia, Hedwig Jagiellon, Electress of Brandenburg and the Elector Augustus of Saxony. His paintings of Saxon princes in the ceremonial hall and the council chamber of the Old Town Hall in Leipzig were continually being completed.

The 1527 election in Cetin (Croatian: Cetinski / Cetingradski sabor, meaning Parliament on Cetin(grad) or Parliament of Cetin(grad), or Cetinski / Cetingradski izbor) was an assembly of the Croatian Parliament (Sabor) in the Cetin Castle in 1527. It followed a succession crisis in the Kingdom of Hungary caused by the death of Louis II, and which resulted in the Kingdom of Croatia joining the Habsburg monarchy. The charter electing the Habsburg Archduke of Austria Ferdinand I as King of Croatia was confirmed with the seals of six Croatian nobles.