Only the tituli were allowed to distribute sacraments. The most important priest in a titulus was given the name of Cardinal. Pope Marcellus I (at the beginning of the 4th century) confirmed that the tituli were the only centres of administration in the Church. In 499 a.d., a synod held by Pope Symmachus listed all the presbyters participating, as well as the tituli who were present at that time.:
- Titulus Aemilianae (Santi Quattro Coronati)
- Titulus Anastasiae (Santa Anastasia)
- Titulus SS Apostolorum (Santi Apostoli)
- Titulus Byzantis or Vizantis (unknown, perhaps "Titulus Pammachii")
- Titulus S Caeciliae (Santa Cecilia in Trastevere)
- Titulus Clementis (San Clemente)
- Titulus Crescentianae (San Sisto Vecchio)
- Titulus Crysogoni (San Crisogono)
- Titulus Cyriaci (Uncertain; theories include Santa Maria Antiqua and Santa Maria in Domnica)
- Titulus Damasi (San Lorenzo in Damaso)
- Titulus Equitii (San Martino ai Monti)
- Titulus Eusebi (Sant'Eusebio)
- Titulus Fasciolae (Santi Nereo e Achilleo)
- Titulus Gaii (Santa Susanna)
- Titulus Iulii (Santa Maria in Trastevere, identical with Titulus Callixti)
- Titulus Lucinae (San Lorenzo in Lucina)
- Titulus Marcelli (San Marcello al Corso)
- Titulus Marci (San Marco)
- Titulus Matthaei (in Via Merulana, destroyed in 1810)
- Titulus Nicomedis (in Via Nomentana, destroyed)
- Titulus Pammachii (Santi Giovanni e Paolo (Rome))
- Titulus Praxedis (Santa Prassede)
- Titulus Priscae (Santa Prisca)
- Titulus Pudentis (Santa Pudenziana)
- Titulus Romani (unknown, perhaps either Santa Maria Antiqua or Santa Maria in Domnica, whichever the "Titulus Cyriaci" wasn't)
- Titulus S Sabinae (Santa Sabina)
- Titulus Tigridae (uncertain, perhaps Santa Balbina)
- Titulus Vestinae (San Vitale)
Read more about this topic: Churches Of Rome