Via di Santa Prassede, 9/a, 00184 Roma RM, Italy
For mosaic lovers this is the church to go. The mosaic in the apse is remarkable and the one chapel is even better.
The Church is full of art but is in a bad state of preservation. Still worth visiting especially to see the mosaic above and behind the main altar. Pictures of this mosaic are very easy to encounter online and on books as it is a very good example of early Christian art. You could also visit the sarcofagi with the remains of many Christian martyrs, which can be accessed from a staircase below and in front of the main altar.
This is a beautiful basilica that is quite obscure. You can consider coming here before/after visiting the Basilica of St. Mary Major. The interior will wow you with the Byzantine-style mosaics and frescoes. A major highlight is an alleged segment of the pillar which Jesus was flogged. This can be found to the right of the basilica. The basilica also houses the relics of St. Praxedes and St. Prudentiana, sisters, who were martyred for their faith in the second century. They were supposedly the first converts of St. Peter according to Tradition.
5 minutes away from basilica of st Marys major
One of the most beautiful basilicas in Rome A truly hidden gem often looked over by modt Rome visitors, even it being only a few steps away from the Santa Maria Maggiore basilica