This church is said to have been originally founded in honour of the Evangelist in 337 by Pope Marco, but this pope, being himself canonized, is also honoured here, and is buried under the high altar. On April 25th, St. Mark's Day, a grand procession of clergy starts from this church. It was for the most part rebuilt under Gregory IV. in 838. Behind the Palazzo Venezia is the vast _Church of Il Gesù_, begun in 1568 by the celebrated Vignola, but the cupola and façade completed in 1575 by his scholar Giacomo della Porta. In the interior is the monument of Cardinal Bellarmin, and various pictures representing events in the lives or deaths of the Jesuit saints,--that of the death of St. Francis Xavier is by _Carlo Maratta_. The high altar, by Giacomo della Porta, has fine columns of giallo-antico. The altar of St. Ignatius at the end of the left transept is of gaudy magnificence. It was designed by Padre Pozzi, the group of the Trinity being by Bernardino Ludovisi; the globe in the hand of the Almighty is said to be the largest piece of lapis-lazuli in existence. Beneath this altar, and his silver statue, lies the body of St. Ignatius Loyola, in an urn of gilt bronze, adorned with precious stones. A great ceremony takes place in this church on July 31st, the feast of St. Ignatius, and on December 31st a Te Deum is sung here for the mercies of the past year, in the presence of the pope, cardinals, and the people of Rome,--a really solemn and impressive service. The _Convent of the Gesù_ is the residence of the General of the Jesuits ("His Paternity"), and the centre of religious life in their Order. The rooms in which St. Ignatius lived and died are of the deepest historic interest. They consist of four chambers. The first, now a chapel, is that in which he wrote his "Constitutions." The second, also a chapel, is that in which he died. It contains the altar at which he daily celebrated mass, and the autograph engagement to live under the same laws of obedience, poverty, and chastity, signed by Laynez, Francis Xavier, and Ignatius Loyola. On its walls are two portraits of Ignatius Loyola, one as a young knight, the other as a Jesuit father, and portraits of S. Carlo Borromeo and S. Filippo Neri. It was in this chamber also that St. Francis Borgia died. The third room was that of the attendant monk of St. Ignatius; the fourth is now a kind of museum of relics containing portions of his robes and small articles which belonged to him and to other saints of the Order. Facing the Church of the Gesù is the _Palazzo Altieri_, built by Cardinal Altieri in 1670, from designs of Giov. Antonio Rossi. "Quand le palais Altieri fut achevé, les Altieri, neveux de Clément X., invitèrent leur oncle à le venir voir. Il s'y fit porter, et d'aussi loin qu'il aperçut la magnificence et l'étendue de cette superbe fabrique, il reboussa chemin le cœur serré, sans dire un seul mot, et mourut peu après."--_De Brosses._