The cultural and social effect of the Renaissance Italian military engineer is profiled within this thesis. It encompasses their vocational careers concerning the fluctuations in individuality, print censorship, and uneasiness attached to patronage and marketability. Their work and reputation directly coincided with the demand for trace italienne from numerous Italian city-states and entities throughout the cinquecento. As knowledge spread throughout the Italian peninsula, the individualistic demand for military engineers diminished, integrating their discipline with other professions. As the demand for patronage intensified, fears of fraudulence and plagiarism existed among printers and fellow engineers. This apprehension directly contributed to a lack of printed fortification treatises throughout the cinquecento and was escalated by foreign interventions (Sack of Rome, 1527). This thesis aims to tackle these issues met by Italian military engineers.