thumb|upright=1.2|Family photograph of the Imperial House of Japan, the world's oldest continuous royal dynasty since at least the [[5th century, with three generations (from left): Empress Michiko, Emperor Akihito, their son Emperor Naruhito and his consort Empress Masako, Crown Prince Akishino and Crown Princess Akishino, and behind them their children (2021)|300x300px]]
A dynasty is a succession of rulers from the same family who govern over a region or country across multiple generations. Dynasties matter historically because they shaped how societies were organized and governed for centuries, with some like Japan's imperial family lasting over 1,500 years.
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thumb|upright=1.2|Family photograph of the Imperial House of Japan, the world's oldest continuous royal dynasty since at least the [[5th century, with three generations (from left): Empress Michiko, Emperor Akihito, their son Emperor Naruhito and his consort Empress Masako, Crown Prince Akishino and Crown Princess Akishino, and behind them their children (2021)|300x300px]]
A dynasty is a sequence of rulers from the same family, usually in the context of a monarchical system, but sometimes also appearing in republics. A "house" is an imperial, royal or noble family, not always ruling. Historians periodize the histories of many states and civilizations, such as the Roman Empire (27 BC – AD 1453), Imperial Iran (678 BC – AD 1979), Ancient Egypt (3100–30 BC), and Ancient and Imperial China (2070 BC – AD 1912), using a framework of successive dynasties. As such, the term "dynasty" may be used to delimit the era during which a family reigned.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).