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Which Italian states took part in the Peace of Lodi?

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Montúfar, Antonio: Saint Francis of Assisi Appearing Before Pope Nicholas V, with Donors — Nicholas V *Saint Francis of Assisi Appearing Before Pope Nicholas V, with Donors*, oil on canvas by Antonio Montúfar, 1628; in the Los Angeles County Museum of Art. 107.95 × 87.63 cm.

The Peace of Lodi, signed in 1454, was a treaty primarily between Venice and Milan that aimed to establish a balance of power among the five major states dominating the Italian peninsula.1

While the initial treaty focused on the conflict between Venice and Milan, it was part of a broader effort to stabilize the region. Pope Nicholas V was instrumental in organizing this peace to preserve the status quo and facilitate a crusade against the Turks, formally including the following states in the agreement:

Venice
Milan
Florence
Naples
The Papal States12

Following the treaty, these powers—along with other Italian states that eventually joined—formed the Italian League, a mutual defensive pact officially proclaimed by Pope Nicholas V on March 2, 1455.1