(b Rocchette, Sabina, 1630; d ?Rome, after 1710). Italian painter. Though evidently an artist of some standing in late 17th-century Rome, with the title of ‘cavaliere’ and several documented pupils, little is now known of his life and work. His training, both from his teacher Lazzaro Baldi and at the Accademia di S Luca (where he was a pupil in 1664), was in the Carracci tradition. This is evident in the Adoration of the Shepherds (Dublin, N.G.). His style shows affinities with that of Carlo Maratti, but he was also interested in Giacinto Brandi, and still more so in Pier Francesco Mola and in Salvator Rosa, whose influence can be seen in such works with a romantic flavour as Virgil and Homer (c. 1668; Copenhagen, Stat. Mus. Kst). The Flora in the Palazzo Chigi in Rome and the two canvases of scenes from the Life of St Thecla at S Giuseppe in Ferrara also date from c. 1668. The artist’s later style shows him moving towards the Baroque, intensifying his relationship with Brandi and with the artists who developed Bernini’s later art, such as Giovanni Battista Gaulli. Troppa collaborated with the latter in the decoration of the oratory of S Marta in Rome (1672), producing two tondi representing Miracles of St Martha (in situ). His later works in the church of SS Ambrogio e Carlo on the Via del Corso in Rome (1678) are similar in style and approach, as is a painting at Cittaducale (1692) and a banner at Torri in Sabina (1700). His much deteriorated frescoes (after 1710) in S Agata in Trastevere are impossible to evaluate.