There are more than 900 churches in Rome. Most, but not all, of these are Catholic. The first churches of Rome originated in places where Christians met. They were divided into three main categories: the houses of private Roman citizens (people who hosted the meetings of Christians also known as oratoria, oracula) the deaconries (places where charity distributions were given to the poor and placed under the control of a deacon; the greatest deaconries had many deacons, and one of them was elected archdeacon) other houses holding a titulus (known as domus ecclesia) Tituli Pope Marcellus I (A.D. 306–308) is said to have recognized twenty five tituli in the City of Rome, quasi dioecesis. It is known that in 336, Pope Julius I had set the number of presbyter cardinals to 28, so that for each day of the week, a different presbyter cardinal would say mass in one of the four major basilicas of Rome, St. Peter's, Basilica of Saint Paul Outside the Walls, Basilica di Santa Maria Maggiore, and Basilica of St. John Lateran. In Stephan Kuttner's view, "...the Roman cardinal priests and bishops were 'incardinated' for permanent (though limited) purposes into the patriarchal basilicas while remaining bound nonetheless to the churches of their original ordination." 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 AD 499, 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