Sigismund, Holy Roman Emperor in the context of "Mary, Queen of Hungary"

The Duchy of Savoy was a territorial entity of the Savoyard state that existed from 1416 until 1847 and was a possession of the House of Savoy.It was created when Sigismund, Holy Roman Emperor, raised the County of Savoy into a duchy for Amadeus VIII. The duchy was an Imperial fief, subject of the Holy Roman Empire, until 1792, with a vote in the Imperial Diet. From the 16th century, Savoy belonged to the Upper Rhenish Circle.

Its territory included the current French departments of Savoie, Haute-Savoie, and the Alpes-Maritimes, the current Italian region of Aosta Valley, a large part of Piedmont and the County of Geneva in Switzerland, which was then lost to the Old Swiss Confederacy. The main Vulgar languages that were spoken within the Duchy of Savoy were Arpitan and Piedmontese.

The House of Hunyadi was one of the most powerful noble families in the Kingdom of Hungary during the 15th century. A member of the family, Matthias Corvinus, was King of Hungary from 1458 until 1490, King of Bohemia (ruling in Moravia, Lower Lusatia, Upper Lusatia, and Silesia) from 1469 until 1490, and Duke of Austria from 1487 until 1490. His illegitimate son, John Corvinus, ruled the Duchy of Troppau from 1485 until 1501, and five further Silesian duchies, including Bytom, Głubczyce, Loslau, Racibórz, and Tost, from 1485 until 1490. The Hunyadi coat-of-arms depicted a raven with a golden ring in its beak.

The founder of the family, Voyk, received the eponymous Hunyad Castle (in present-day Hunedoara, Romania) from Sigismund, King of Hungary, in 1409. His ethnicity is the subject of scholarly debate. Some modern historians describe him as a Vlach, or Romanian, knez or boyar, from either Wallachia or Transylvania. Others describe him as a Cuman or Slav nobleman. According to the 15th-century historian, Johannes de Thurocz, Voyk moved from Wallachia to Transylvania. Voyk's oldest son, John Hunyadi, was often mentioned as a "Vlach" by his contemporaries.

The Hussite Wars, also called the Bohemian Wars or the Hussite Revolution, were a series of civil wars fought between the Hussites and the combined Catholic forces of Holy Roman Emperor Sigismund, the Papacy, and European monarchs loyal to the Catholic Church, as well as various Hussite factions. At a late stage of the conflict, the Utraquists changed sides in 1432 to fight alongside Roman Catholics and opposed the Taborites and other Hussite factions. These wars lasted from 1419 to approximately 1434.

The unrest began after pre-Protestant Christian reformer Jan Hus was executed by the Catholic Church in 1415 for heresy. Because Sigismund had plans to be crowned the Holy Roman Emperor (requiring papal coronation), he suppressed the religion of the Hussites, yet it continued to spread. When King Wenceslaus IV of Bohemia, brother of Sigismund, died of natural causes a few years later, the tension stemming from the Hussites grew stronger. In Prague and various other parts of Bohemia, the Catholic Germans living there were forced out.

Amadeus VIII (4 September 1383 – 7 January 1451), nicknamed the Peaceful, was Count of Savoy from 1391 to 1416 and Duke of Savoy from 1416 to 1440. He was the first to hold the ducal title, granted by Emperor Sigismund. Known for his diplomatic temperament and administrative reforms, he strengthened the state's institutions and fostered internal peace.

He also claimed the papacy from 1439 to 1449 as Antipope Felix V, in opposition to Popes Eugene IV and Nicholas V, becoming the last historical antipope recognised by a significant portion of the Catholic clergy.
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Ľubovňa Castle (Slovak: Ľubovniansky hrad, Hungarian: Lubló vára, Polish: Zamek Lubowelski) is a medieval castle located in the city of Stará Ľubovňa in Slovakia. The castle was built in the late 13th century, when the territory belonged to the Kingdom of Hungary. The first written mention dates back to the year 1311. In 1412, King Sigismund of Hungary and King Władysław Jagiellon of Poland met at the castle and signed a pact of friendship and peace.

The castle is now partly a ruin and partly rebuilt. The preserved rooms house a museum. The castle chapel houses a permanent exhibition of copies of the Polish crown jewels, the originals of which were kept there during the Swedish Deluge. Below the castle is the Museum of Folk Architecture of the Spiš Region, which is an open-air museum. Within the conserved section of the castle lies a museum that features a historical exhibition, a display of period furniture and weaponry. The castle houses an exhibition room that hosts seasonal exhibitions. Some rooms retain barrel and Prussian vaults, while an underground torture chamber has also been preserved.

The Order of the Dragon (Latin: Societas Draconistarum, literally "Society of the Dragonists") was a monarchical chivalric order only for selected higher aristocracy and monarchs, founded in 1408 by Sigismund of Luxembourg, who was then King of Hungary and Croatia (r. 1387–1437) and later also Holy Roman Emperor (r. 1433–1437). It was fashioned after the military orders of the Crusades, requiring its initiates to defend the cross and fight the enemies of Christianity, particularly the Ottoman Empire.

The Order flourished during the first half of the 15th century, primarily in Germany and Italy. After Sigismund's death in 1437, its importance declined in Western Europe. However, after the Fall of Constantinople in 1453, it continued to play a role in Hungary, Serbia and Romania, which bore the brunt of the Ottoman incursions. The Prince of Wallachia Vlad II Dracul, the father of Vlad the Impaler, took his name from the Order of the Dragon, also known as Ordinurului de Dracul.

Albert the Magnanimous KG, elected King of the Romans as Albert II (10 August 1397 – 27 October 1439), was a member of the House of Habsburg. By inheritance he became Albert V, Duke of Austria. Through his wife (jure uxoris) he also became King of Hungary, Croatia, Bohemia, and inherited a claim to the Duchy of Luxembourg.

He played a significant role in the Hussite Wars, assisting his father-in-law Sigismund and suffering defeats like the Battle of Domažlice in 1431. Crowned King of Hungary in 1438, he struggled to control Bohemia and fought against Polish-Bohemian forces. He later became King of the Romans but died in 1439 while defending Hungary from the Ottomans. His reign saw anti-Hussite and anti-Jewish persecutions, continuing medieval crusades against perceived heretics. Austrian Jews faced increased taxation and expulsions, culminating in the 1420 Vienna pogrom, partly driven by accusations of aiding the Hussites.