Final answer:
Luke likely gathered information for the Book of Acts while staying at the house of the deacon Philip in Caesarea. This was during the time of the expansion of Christianity, with key figures like Paul evangelizing in major cities of the Greco-Roman world.
Step-by-step explanation:
Luke stayed at the house of the important deacon named Philip in Caesarea, where he possibly gathered information for the Book of Acts.
The spread of Christianity in the Greco-Roman world was significantly influenced by apostles like Paul, who, previously known as Saul, experienced a profound conversion to Christianity.
After Paul's conversion, he became a driving force in evangelizing and spreading the teachings of Jesus, particularly in cities like Ephesus, Corinth, Thessalonica, and Rome - key locations in the historical narrative of the Christian religion.