Complex sentence: It is on this trip that he became aware of the work of Vanvitelli and Ferdinando Fuga, he took their ideas back to Sicily, and their influence is clearly visible in his final works, especially the Collegio Cutelli and the Piccola Badia.
Split into simpler sentences: It is on this trip that he became aware of the work of Vanvitelli and Ferdinando Fuga, taking their ideas back to Sicily. Vanvitelli's influence is clearly visible in his final works, especially the Collegio Cutelli and the Piccola Badia.