Ferdinand I of Austria in the context of "Franz Joseph I of Austria"

Dona Maria Leopoldina of Austria (22 January 1797 – 11 December 1826) was the first Empress of Brazil as the wife of Emperor Dom Pedro I from 12 October 1822 until her death. She was also Queen of Portugal during her husband's brief reign as King Dom Pedro IV from 10 March to 2 May 1826.

She was born in Vienna, Austria, the daughter of Holy Roman Emperor Francis II, and his second wife, Maria Theresa of Naples and Sicily. Among her many siblings were Emperor Ferdinand I of Austria and Marie Louise, Duchess of Parma, the wife of Napoleon Bonaparte.

The Hungarian Revolution of 1848, also known in Hungary as Hungarian Revolution and War of Independence of 1848–1849 (Hungarian: 1848–49-es forradalom és szabadságharc) was one of a number of European Revolutions of 1848 and was closely linked to other revolutions of 1848 in the Habsburg areas. Although the Hungarian War of Independence failed, it is one of the most significant events in Hungary's modern history, forming the cornerstone of modern Hungarian national identity—the anniversary of the Revolution's outbreak, 15 March, is one of Hungary's three national holidays.

In April 1848, Hungary became the third country of Continental Europe (after France, in 1791, and Belgium, in 1831) to enact a law implementing democratic parliamentary elections. The new suffrage law (Act V of 1848) transformed the old feudal parliament (Estates General) into a democratic representative parliament. This law offered the widest right to vote in Europe at the time. The April laws utterly erased all privileges of the Hungarian nobility.

The Principality of Transylvania, from 1765 the Grand Principality of Transylvania, was a realm of the Hungarian Crown ruled by the Habsburg and Habsburg-Lorraine monarchs of the Habsburg monarchy (later Austrian Empire) and governed by mostly Hungarians. After the Ottomans were ousted from most of the territories of medieval Kingdom of Hungary, and after the failure of Rákóczi's War of Independence (1703–1711), the Habsburg dynasty claimed the former territories of the Principality of Transylvania under the capacity of their title of "King of Hungary". During the Hungarian Revolution of 1848, the Hungarian government proclaimed union with Transylvania in the April Laws of 1848 (after the Transylvanian Diet's confirmation on 30 May and the king's approval on 10 June for Transylvania to become once again an integral part of Hungary). After the failure of the revolution, the March Constitution of Austria decreed that the Principality of Transylvania be a separate crown land entirely independent of Hungary. In 1867, as a result of the Austro-Hungarian Compromise, the principality was reunited with Hungary proper.

The crown of Saint Wenceslas (Czech: Svatováclavská koruna, German: Wenzelskrone) is a crown forming part of the Bohemian crown jewels, made in 1346. Charles IV, king of Bohemia and Holy Roman Emperor, had it made for his coronation, dedicating it to the first patron saint of the country St. Wenceslas and bequeathed it as a state crown for the coronation of (future) Bohemian kings. On the orders of Charles IV, the new royal crown was deposited in St. Vitus Cathedral, then later transferred to Karlštejn Castle. It was used for the last time in the coronation of Ferdinand V in 1836.