(Collecta: S. Giorgio in Velabro)
From Blessed Ildefonso Schuster's The Sacramentary:
The basilica where people met today for the collecta before the procession still stands on the further side of the pons Senatorum, in the regio of the Velabrum.
The titulus Caeciliae is in Trastevere, in the actual house of the martyr. Recent discoveries have brought to light a great part of this ancient Roman dwelling, where St. Cecilia first converted to the faith her husband, Valerian, toether with his brother Tiburtius, and which she afterwards hallowed by her martyrdom. In 1595, the sacrophagus under the high altar containing her relics was opened, and the body of the holy virgin was found in the same position as it had assumed after the fatal blow of the executioner, lying on one side.
From the Churches of Rome wiki:
The first church on the site was built in the 3rd or 5th century, and the baptistery from this church was found during excavations, situated underneath the present Chapel of Relics. A house from the Imperial era was also found, and tradition claims that the church was built over the house in which St Cecilia lived. This house was one of the tituli, the first parish churches of Rome, known as the titulus Ceciliae. The church was rebuilt by Pope Paschal I (817-824). At that time, the martyr's remains were brought from the catacombs of St Calixtus. The present church is a result of 18th century rebuilding, performed on orders from the titular of the church, Cardinal Francesco Acquaviva. Some older elements were preserved. The interior was partly restored in 1822 by Cardinal Giacomo Doria-Pamphilii, also titular priest of the church. Improvements were made to the crypt in 1889, and during the work remains of Roman houses from the Republican period were found.
