Sant'Andrea della Valle
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 of San Silvestro al Quirinale (c. 1628) and San Carlo ai Catinari (1628–30).