The present Italian Renaissance church was eventually built in its place and finally consecrated in 1585 by the great urbanizer Pope Sixtus V, whose "via Sistina" connected the Piazza della Trinità dei Monti (outside the church) to the Piazza Barberini across the city. The architect of the facade is not known for certain, but Wolfgang Lotz suggests that it may have originated in a design by Giacomo della Porta (a follower of Michelangelo), who had built the church of Sant'Atanasio dei Greci, which has similarities, a little earlier. The double staircase in front of the church was by Domenico Fontana.