How Marius, Sulla, Pompey, and Caesar Changed Rome

In the late Republic, Rome was transformed not only by political conflict and civil war, but by generals who changed both its institutions and its physical landscape. From Gaius Marius to Julius Caesar, military leaders used political power, wealth, and building projects to strengthen their positions. As their influence grew, the effects could be seen in Rome’s government as well as its temples, forums, theaters, and public spaces.

Gaius Marius

Gaius Marius, consul seven times between 107 and 86 BCE, was one of the most important military and political figures of the late Republic. His career marked an important shift in the relationship between military commanders and Roman politics. Marius recruited soldiers from a broader pool of citizens, including men with limited property, and his repeated commands helped strengthen the connection between military service and individual commanders. His victories over Jugurtha and the Cimbri and Teutones made him a popular hero, while his political conflicts contributed to the growing instability of the Republic.

His military success also left a mark on Rome itself. Marius restored temples, sponsored monumental dedications connected with his victories, and became associated with public commemorations of military achievement. His connection to the Campus Martius and Rome’s sacred spaces illustrates an important development of the period: military success could be translated into political influence and permanent monuments within the city.

Lucius Cornelius Sulla

Lucius Cornelius Sulla took this transformation further. After marching on Rome and defeating his rivals, he became dictator in 82 BCE and introduced constitutional reforms intended to strengthen the Senate and limit the power of the popular assemblies. His rise demonstrated the growing ability of a successful general to use military force to determine the political order of Rome.

Sulla also reshaped the city. He rebuilt the Temple of Jupiter on the Capitoline after its destruction, expanded the pomerium, reorganized parts of the Forum, and monumentalized spaces associated with Roman religious and political authority. His proscriptions also transformed property ownership, as confiscated property was redistributed among his supporters.

Under Sulla, political power and physical reconstruction became closely connected. The same general who had used an army to seize control of Rome also altered its institutions, property ownership, and monumental landscape.

Pompey the Great

Pompey the Great continued this pattern, combining military success with political influence and monumental construction. After his campaigns in the East and his triumphs, he financed Rome’s first permanent stone theater, the Theater of Pompey, dedicated in 55 BCE.

The complex was more than a theater. It included a portico, gardens, a curia, and a temple to Venus Victrix, creating a large public space that brought entertainment, religion, and politics together. The complex also became part of Rome’s political history when the Curia of Pompey later hosted the Senate meeting at which Julius Caesar was assassinated.

Pompey’s building program showed how a powerful general could use public architecture to establish a lasting presence in Rome. His influence extended beyond military command and political office into the city’s physical and social landscape.

Julius Caesar

Julius Caesar brought this process to its most ambitious stage. His dictatorship gave him the political authority to undertake major changes to Rome, while his building program sought to reshape important parts of the city.

He constructed the Forum Iulium, centered on the Temple of Venus Genetrix, connecting his family to the goddess through the Julian claim of divine ancestry. He also initiated plans to reroute traffic, drain marshlands, and expand public spaces. Caesar began the rebuilding of the Senate house, the Curia Julia, and undertook broader plans for reorganizing the city.

His changes were not limited to architecture. Caesar also reorganized the calendar and altered aspects of Rome’s political administration. His projects therefore combined changes to the city’s physical environment with changes to the institutions that governed it.

By Caesar’s time, military authority, political power, and urban development had become closely connected. His projects anticipated the much larger transformation of Rome under Augustus, when the city became the administrative and monumental center of an expanding empire.

Rome as the Battleground

From Marius to Caesar, Rome changed both politically and physically. Marius helped strengthen the connection between military success, political influence, and public commemoration. Sulla used military force to seize power and then reorganized the Republic while rebuilding parts of the city. Pompey combined political influence and military wealth with an ambitious public building program. Caesar went further, using his extraordinary political authority to reshape both Rome’s civic center and its institutions.

By the time of Caesar’s assassination in 44 BCE, the Republic had already undergone profound changes. Generals had become powerful political actors, military success had become closely connected to political authority, and Rome’s forums, temples, theaters, and political spaces increasingly reflected the ambitions of individual leaders.

The physical transformation of Rome was therefore part of a larger political transformation. The city that emerged from the struggles of the late Republic was already different from the Rome of earlier generations, providing the foundation for the imperial capital that Augustus would build.

Bibliography

Primary Sources

Plutarch. Life of Caesar.

Plutarch. Life of Marius.

Plutarch. Life of Pompey.

Plutarch. Life of Sulla.

Secondary Sources

Evans, R. J. Gaius Marius: A Political Biography. University of South Africa, 1994.

Flower, Harriet. Roman Republics. Princeton University Press, 2010.

Keaveney, Arthur. Sulla: The Last Republican. 2nd ed. Routledge, 2005.

Russell, Amy. The Politics of Public Space in Republican Rome. Cambridge University Press, 2015.

Ulrich, Roger B. “Julius Caesar and the Creation of the Forum Iulium.” American Journal of Archaeology 97, no. 1 (1993): 49–80. https://doi.org/10.2307/505839.

Zampieri, Eleonora. Politics in the Monuments of Pompey the Great and Julius Caesar. Routledge, 2023.