Gerolamo Olgiati

Gerolamo Olgiati (1453 – 2 January 1477) was a government official in Milan and one of the assassins of Galeazzo Maria Sforza, the Duke of Milan, along with Giovanni Andrea Lampugnani and Carlo Visconti.

Olgiati was the political radical of the conspiracy, bearing no known grudge against the Duke, but rather acting out of Republican ideals. He claimed in a subsequent confession that many of ideas were the product of studying under Cola Montano a Humanist educator who had first suggested the assassination.

The Duke, although popular as a patron of the arts, was known to be somewhat of a tyrant in his rule and made many enemies through his reputation as a womaniser. Olgiati was soon involved in a conspiracy with Lampugnani and Visconti, two older officials who each had more personal reasons to assassinate the Duke.