treated, while [Domenichino], on the contrary, was either not recognized or constantly mistreated in the fees he got, so that he was left without commissions and rejected. Therefore, he was forced to go begging for work, with much effort, through intermediaries, and at any price... the same had been true of the Flagellation of Saint Andrew, which had been painted for a hundred and fifty scudi, whereas in the case of the Adoration of the Cross on the opposite wall four hundred scudi had gone to Guido.' One of Domenichino's masterpieces, his frescoes of Scenes of the Life of Saint Cecilia in the Polet Chapel of San Luigi dei Francesi, was commissioned in 1612 and completed in 1615. Concurrently he painted his first, and most celebrated, altarpiece, The Last Communion of St. Jerome for the church of San Girolamo della Carità (signed and dated, 1614). It subsequently would be judged as being comparable to Raphael's great Transfiguration and even as "the best picture in the world." By late 1616, Domenichino had designed the coffered ceiling with The Assumption of the Virgin in Santa Maria in Trastevere; and he had begun a cycle of ten frescoes depicting the Life of Apollo in a garden pavilion of the Villa Aldobrandini (Belvedere) in Frascati, where he was assisted by Giovanni Battista Viola, a Bolognese artist who, like Domenichino himself, was a pioneer in the development of classicistic landscape painting. From 1617 until 1621, Domenichino was absent from Rome, working in Bologna and at Fano, where during 1618–19 he frescoed the Nolfi chapel of the Fano Cathedral with Scenes from the Life of the Virgin. With the election of a Bolognese pope (Gregory XV) in 1621, Domenichino returned to Rome. Appointed Papal Architect (he built little but left drawings for various projects, most notably for the façade of Sant'Andrea della Valle and for the plan of Sant'Ignazio, both in Rome), he nonetheless continued to be most active as a painter, obtaining many commissions for altarpieces in Roman churches (San Lorenzo in Miranda, 1626–27, SS. Giovanni Evangelista e Petronio dei Bolognesi, 1626–1629, Santa Maria della Vittoria, 1629–30, and St. Peter's, 1625–1630). He also executed numerous frescoes in Rome during the 1620s: a ceiling in the Palazzo Costaguti (c. 1622); the choir and pendentives in Sant'Andrea della Valle, where he worked in fierce competition with Lanfranco, who painted the dome above Domenichino's pendentives; and the pendentives