The term "Roman king" refers to the early rulers of ancient Rome during the period known as the Roman Kingdom, which lasted from approximately 753 to 509 BCE. This era is characterized by a series of seven kings, starting with Romulus, the legendary founder of Rome. These kings held significant power, overseeing military, religious, and administrative duties. The last king, Tarquin the Proud, was overthrown, leading to the establishment of the Roman Republic. This transition marked a shift from monarchy to a system of elected officials, significantly influencing the political structure of Rome and its future governance.