Giovanni Battista Costa (painter, fl. c. 1670)
Giovanni Battista Costa () was an Italian painter, active in Milan about 1670. The churches of San Agostino, San Giovanni and San Eustorgio in Milan each have a painting by him. References

Sources 
 Martin, Andrew John (2021). "Costa, Giovanni Battista (1670)". In Beyer, Andreas; Savoy, Bénédicte; Tegethoff, Wolf (eds.). Allgemeines Künstlerlexikon - Internationale Künstlerdatenbank - Online. K. G. Saur. Retrieved 7 October 2022. "Costa, Giovanni Battista". Benezit Dictionary of Artists. 2011. Oxford Art Online. Retrieved 7 October 2022. 17th-century Italian painters