Ottokar II of Bohemia in the context of "Königsberg"

Wenceslaus II Přemyslid (Czech: Václav II.; Polish: Wacław II Czeski; 27 September 1271 – 21 June 1305) was King of Bohemia (1278–1305), Duke of Cracow (1291–1305), and King of Poland (1296–1305).

He was the only son of King Ottokar II of Bohemia and Ottokar's second wife Kunigunda. He was born in 1271, ten years after the marriage of his parents. Kunigunda was the daughter of Rostislav Mikhailovich, lord of Slavonia, son of a Grand Prince of Kiev, and Anna of Hungary, daughter of Béla IV of Hungary. His great-grandfather was the German king Philip of Swabia. Wenceslaus II was the grandfather of the Holy Roman Emperor, Charles IV. He was a member of the Přemyslid dynasty.

The House of Habsburg (/ˈhæpsbɜːrɡ/; German: Haus Habsburg, lit. 'House of the Hawk's hill' [haʊs ˈhaːbsbʊrɡ] ), also known as the House of Austria, was one of the most powerful dynasties in the history of Europe and Western civilization. They were best known for ruling vast realms throughout Europe and the Americas during the Middle Ages and early modern period, including the Holy Roman Empire and Spain.

The house takes its name from Habsburg Castle, a fortress built in the 1020s in present-day Switzerland by Radbot of Klettgau, who named his fortress Habsburg. His grandson Otto II was the first to take the fortress name as his own, adding "Count of Habsburg" to his title. In 1273, Count Radbot's seventh-generation descendant, Rudolph, was elected King of the Romans. Taking advantage of the extinction of the Babenbergs and of his victory over Ottokar II of Bohemia at the Battle on the Marchfeld in 1278, he appointed his sons as Dukes of Austria and moved the family's power base to Vienna, where the Habsburg dynasty gained the name of "House of Austria" and ruled until 1918.

The Hofburg (German: [ˈhoːfbʊʁk]) is the former principal imperial palace of the Habsburg dynasty in Austria. Located in the center of Vienna, it was built in the 13th century by Ottokar II of Bohemia and expanded several times afterwards. It also served as the imperial winter residence, as Schönbrunn Palace was the summer residence. Since 1946, it has been the official residence and workplace of the president of Austria.

Since 1279, the Hofburg area has been the documented seat of government. The Hofburg has been expanded over the centuries to include various residences (with the Amalienburg and the Albertina), the imperial chapel (Hofkapelle or Burgkapelle), the imperial library (Hofbibliothek), the treasury (Schatzkammer), the Burgtheater, the Spanish Riding School (Hofreitschule), the imperial mews (Stallburg and Hofstallungen).

The Principality of Opava (Czech: Opavské knížectví; Polish: Księstwo Opawskie) or Duchy of Troppau (German: Herzogtum Troppau) was a historic territory split off from the Margraviate of Moravia before 1269 by King Ottokar II of Bohemia to provide for his natural son, Nicholas I. The Opava territory thus had not been part of the original Polish Duchy of Silesia in 1138, and was first ruled by an illegitimate offshoot of the Bohemian Přemyslid dynasty, not by the Silesian Piasts like many of the neighbouring Silesian duchies. Its capital was Opava (Troppau) in the modern-day Czech Republic.

From 1337 onwards, the Přemyslid dukes also ruled the adjacent former Piast Duchy of Racibórz, whereupon Opava became united with the Upper Silesian lands. When the Opava branch became extinct in 1464, it fell back to the Bohemian Crown, from 1526 part of the Habsburg monarchy. In the final three centuries of its existence, the duchy was ruled by the House of Liechtenstein. It was dissolved with the Austro-Hungarian Empire in 1918, but the title of Duke of Troppau and Jägerndorf still exists, belonging to a present-day monarch, Prince Hans-Adam II of Liechtenstein. The Duchy of Jägerndorf (Krnov) was another of the Silesian duchies.