The type of government ruled by a monarch is called a monarchy. In a monarchy, a single individual, usually known as the king or queen, holds supreme authority and is often seen as the head of state. Monarchies can be absolute, where the monarch has nearly complete power over governance, or constitutional, where the monarch's powers are limited by a constitution or legislative body. Many monarchies have historical roots and are often tied to longstanding traditions and cultural practices. Although some modern monarchies have transitioned to more democratic systems, the institution remains significant in several countries around the world.