Giovanni Battista Langetti (1625–1676), also known as Giambattista Langetti, was an Italian late-Baroque painter. He was active in his native Genoa, then Rome, and finally for the longest period in Venice.
He first trained with Assereto, then Pietro da Cortona, but afterwards studied under Giovanni Francesco Cassana, appeared in Venice by the 1650s where he worked in a striking Caravaggesque style. He is thought to have influenced Johann Karl Loth and Antonio Zanchi. He painted many historical busts for private patrons in the Venetian territory and in Lombardy. He died at Venice in 1676.

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