Alberto Prosdocimi was an Italian painter and manuscript illuminator. He often painted vedute of Venice in pale and bright watercolors, often sold abroad

He studied painting at the Accademia of Venice, but also trained in the studio of his father. He often painted in watercolor, but like his father, he was a respected manuscript illuminator. He copied the Grimani Breviary held in the Library of San Marco at Venice.

He completed the diplomas of honor awarded by Florence to their mayor Peruzzi factory. He was commissioned by Queen Margherita to create an illuminated portrait of the Prince of Naples. He also made an elaborately illuminated album by the aristocracy of Padua and Verona as a gift to the Queen. He was engaged to tutor in painting the Princess Hohenzollern-Sigmaringen and of the hereditary Granduchess of Granduchessa Holdemburg. The latter commissioned some watercolors from him.

He was one of the collaborators of a masterwork La basilica di S. Marco illustrata nella storia e nell'arte (1878–93), published by Ferdinando Ongania. Prosdocimi made the drawings of the Basilica that were used in chromolithographs by Ongania.