The church of Santa Sabina on the Aventine is one of the best proofs that Rome consists of many layers (ages). According to the inscription, the prayer house was built in the 5th century (and renovated in the 16th, 17th, 18th and 20th centuries). However, there was already something here before that: houses of the Roman population, which were simply built over.
If you enter the church today, you can even see this, so there is evidence (openings) that the foundations were much deeper. In the 2nd century, a Christian woman named Sabina lived here, was executed as a martyr and is also said to have been buried here on the Aventine.
The north orientation of the church is untypical and special, but has the simple reason that the ancient foundation walls were oriented in this cardinal direction.
The columns in the church are also from the 2nd century, whether the floor too is, is still uncertain.
The wooden ceiling, 31 windows, the large central nave, the mosaics above the columns and the apse are all simple in design, but the space is flooded with light and really shines at certain hours of the day.
Above the main entrance is a mosaic with a golden inscription and two women symbolising the Judaism (left) and Paganism (right) of the church.
On the other side of the entrance (i.e. from the outside), you can still see the original 5th century wooden door with its 28 reliefs (18 are still preserved). Each relief reflects a very significant event for the church. The first relief on the top left is the oldest depiction in wood of Jesus on the cross. Although he is not hanging on a cross here, standing upright and with his eyes open, this is because at this time people refrained from depicting the crucifixion in a truthful and suffering manner.
By the way, next to the entrance portal you find beautiful spolia (components and remains) of other figures, columns or tombs adorn the façade.