The House of Wettin (German: Haus Wettin) is a dynasty of German counts, dukes, prince-electors and kings that once ruled territories in the present-day German states of Saxony, Saxony-Anhalt and Thuringia. The dynasty is one of the oldest in Europe, and its origins can be traced back to the town of Wettin, Saxony-Anhalt.
The House of Ascania (German: Askanier) was a dynasty of German rulers. It is also known as the House of Anhalt, which refers to its longest-held possession, Anhalt. The Ascanians are named after Ascania (or Ascaria) Castle, known as Schloss Askanien in German, which was located near and named after Aschersleben.
A Casa Romanov (em russo: Дом Рома́новых, transl. Dom Romanovykh), foi a casa imperial reinante, que governou o Império Russo por oito gerações entre 1613 e 1762.