The Noble Houses of Germany refer to the aristocratic families that played significant roles in the country's history, particularly during the Holy Roman Empire. These houses often held vast lands and titles, influencing politics, culture, and society. Notable examples include the House of Hohenzollern, which produced Prussian kings, and the House of Wittelsbach, known for its connection to Bavarian royalty. Many noble houses were recognized by their unique coats of arms and were often involved in regional governance. The decline of the nobility began in the 19th century, especially after the German Revolution of 1918, which led to the abolition of many noble privileges.