In 1706, the palace was acquired by Giuseppe Maria Zagnoni, whose family lived in the adjacent structure.
In 1756 the marchese Antonio, son of Giuseppe Maria, obtained permission from the Senate to substitute the wooden pilasters with a stone portico.
This work proceeded until 1764, when the son of Antonio, Giuseppe, commissioned the present Neoclassic facade from Francesco Tadolini.
The interior decoration was commissioned by Prince Clemente Spada Veralli, from Girolamo dal Pane, who painted marine divinities.
[1] The last heir of the Spada Veralli sold the palace to the Circolo della Caccia, an exclusive hunting club, in 1927.