The two fontane dei mostri marini ("sea monster fountains") are located in the Piazza della Santissima Annunziata in Florence, Italy.

To this end, artist Pietro Tacca began to work on them in 1627 with the help of two students: Bartolomeo Salvini and Francesco Maria Bandini.

In 1641, following the death of Tacca, the fountains were placed in the Santissima Annunziata plaza on opposite sides of the Equestrian Monument of Ferdinando I.

The fountains were restored over a period spanning from 1987 to 1988, and again between May and June 1996 by Giovanni Morigi under the direction of the Carlo Francini Office of Fine Arts of the City of Florence.

[citation needed] These two fountains are considered masterpieces among Mannerist sculptures for their beauty and balance, using contemporary marine symbology (such as seashells, fish, legendary monsters, garlands of shellfish and algae, and masks) alongside traditional maritime themes and symbols.