Beginning in 509 BCE, Rome was governed as a

While the Roman Republic incorporated democratic elements, such as voting and citizen participation, it was not a pure democracy. Instead, it was characterized by a complex system where power was held by elected representatives rather than direct popular vote, distinguishing it from the modern concept of democracy.

Monarchy refers to a system where a single ruler, usually a king or queen, holds absolute power. Rome was a monarchy before 509 BCE, but after the establishment of the Republic, the monarchy was abolished and replaced by a system that rejected hereditary rule in favor of elected magistrates.

A dictatorship is a form of government in which a single individual wields absolute power without the consent of the governed. Although the Roman Republic did allow for temporary dictatorships during emergencies, it was fundamentally a republic governed by elected officials, not a permanent dictatorship.

Theocracy is a system where priests or religious leaders control the government in the name of a deity. Rome was not governed by religious leaders; its political structure was based on secular laws and elected representatives, making theocracy an inaccurate description of its governance.