Girolamo Borro

Girolamo Borro (1512 – 26 August 1592) latinized as Hieronomyus Borrius was an Italian philosopher and a professor at the University of Pisa.

A patron of his was Cardinal Giovanni Salviati and after his death he held a chair in philosophy at Pisa with colleagues like Selvaggio Ghettini.

Like several other Tuscan philosophers of the period including Andrea Cesalpino and Francesco Buonamici he rejected the use of theology to explain natural phenomena.

He was brought into the heresy trial of Pietro Carnesecchi in 1567 and during the Roman inquisition of 1582 but was cleared by influence from Pope Gregory XIII.

He used the phrase "periculum facere" for his trials such as those that involved simultaneously dropping a piece of wood and an equal weight of lead from a height to examine which fell first.