How did a signoria differ from a Renaissance republic?

In the context of Renaissance Italian city-states, the primary distinction between a signoria and a republic lies in the concentration and source of political power.12

• Signoria: This form of government was characterized by the rule of a single individual or family, known as a signore (lord or despot). These rulers often rose to power by exploiting internal factional struggles within a commune, eventually consolidating authority over administration, justice, and the military. While they sometimes maintained the appearance of republican institutions, these bodies were reduced to minor administrative roles or formal approval of the signore’s decisions. Over time, this rule typically became hereditary and was often legitimized through papal or imperial titles, effectively transforming the city-state into a principality.12

• Republic: In contrast, a Renaissance republic was governed by collective institutions, such as councils and magistrates, often representing a merchant or patrician oligarchy. Power was theoretically shared among a segment of the citizenry, with officials serving on a rotating, short-term basis. Republics relied on the participation of their ruling class to maintain public order and protect commercial interests, making them more resistant to the rise of a single dominant family.23