Formed in Florence he went to Rome (1717-26; access portico to the church of S. Cecilia, 1725), then to Naples (chapel of palazzo Cellamare, 1727). In 1730 he returned to Rome, as architect of the pontifical palaces (iter 9) . His most meaningful works belong to this period: at this time he built the Quirinal's wing known as the “long sleeve” (iter 3), palazzo della Consulta (iter 3), and palazzo Corsini (1732-36, iter 5), the church of S. Maria della Morte and the façade of S. Maria Maggiore (1743-50, iter 3) evolving his style from an early baroque shape to a Tuscan taste line simplification. Palazzo della Consulta is noticeable due to the clear and composed surfaces of its horizontally developed façade neatly scanned in accordance with the traditional scheme of two superimposed orders; S. Maria Maggiore's prospect is more lively and animated by chiaroscuros, it was originally inserted in the wings of a palace as tall as the church and connected to these by an upper balustrade; palazzo Corsini's atrium is worthy of note; scenographically linked to a pair of very lively stair ramps. In 1750, Fuga moved to Naples, revealing, here too, his gifting as a builder in the Albergo dei Poveri (begun in 1751 but completed only in 1821), a colossal building that's 534 meters long; in the Granili and in the church of the Gerolomini (around 1780) whose prospect is closed between two campanili similar to Borromini's in S. Agnese in Agone in Rome.