Final answer:
The facade of Il Gesu in Rome was designed by 1) Giacomo della Porta, and is a significant work of late Renaissance architecture.
Step-by-step explanation:
The facade of Il Gesu, a church located in Rome, Italy, was designed by Giacomo della Porta.
1) Giacomo della Porta was an Italian architect who made significant contributions to the architecture of the late Renaissance period.
He worked on the design of the facade after the original plans by Giacomo Barozzi da Vignola, who was responsible for the initial design of the church.
It's important to note that Giovanni Battista Gaulli, also known as il Baciccio, was the artist who painted the famous ceiling fresco inside the church, titled The Triumph of the Name of Jesus.