St.Lorenzo Maggiore is the church in Milan showing more remains from the early Christian age and Byzantine age too. Built in the 4th century, it has kept the original octagonal plan even after the reconstruction done in 12th and in the 14th century. The interior, wide and majestic, is surrounded by a large ambulatory at the groud floor and from a women's gallery at the first floor; besides it is covered by an imposing dome which, as usual here in Milan, has a polygonal shape at the exterior. Inside the lateral chapel of St.Aquilino, belonging to the 4th century, there are still some early Christian mosaics. In the open space facing the church's front, there is a long line of Roman columns, one of the few visible remains from the ancient Roman city of Mediolanum.

St.Eustorgio is, as regards its actual shape, a combination of works done in different periods. The first building belongs to the 4th century, from which they remain today part of the apse and the tombs. Particularly interesting is the exterior of the apse, which belongs probably to the 10th century. But the most relevant part for its artistic value is the Portinari Chapel, showing the most important painting cycle in Milan from 15th century, work by Vincenzo Foppa. The chapel is a beautiful example of the realistic roots of the Lombard art, inspired by the daily life and reproducing it in the holy scenes it represents: even the landscapes on the backgounds have not only a scenographical function but also show their own credibility, independently from the scene portrayed on the front.

The church and baptistry of St.Satiro were performed by Bramante, except the Romanesque bell tower from the 11th century and the church front done in 1871. Among Bramante's works, it is the one which mostly complies to the classical style norms. The problem of the missing space behind the altar is solved by the architect using a background with golden stucco by which he creates, thanks to a fictious perspective, the illusion of an actually unexisting apse. Remarkable is also the dome. Inside the church is englobed a small basilica from the early Christian age with Greek cross plan, showing some beautiful frescoes and terracotta works.