Aquila and his wife Priscilla he found in Corinth when he first came there (Acts 18:1). "And because he was of the same trade," says St. Luke, "he stayed with them and worked, for by trade they were tentmakers" (Acts 18:3). Thus they evidently moved from Corinth to Ephesus, where Paul then was. Therefore he greets the Corinthians also on their behalf.
See here how, by greetings both generally from the Asian Churches and particularly from the household church of Aquila, he unites all with the bond of love. Notice also the virtue of these holy spouses, Aquila and Priscilla. They made their house a church, where the faithful gathered, prayed, and celebrated the divine Mysteries.
Not only Aquila had such a church, but also Nymphas in Laodicea and Philemon in Colossae. Philemon's house of this kind still existed in the fifth century after the Nativity of Christ (Col 4:5?; Phlm 1:2; Theodoret, preface to Philippians).