Paul was in prison under house arrest in Rome when he wrote this epistle, the date being about AD 64. This first imprisonment lasted for two years. Since he was executed in AD 66-68 under Nero, following his second imprisonment, the epistle was written near the close of his ministry, a ministry that lasted about 33 years. Evidently, he had inherited a lot of money and was a Roman citizen. While under house arrest, he had visitors and was able to witness, even converting some of Nero’s household.