Acts 19:9 mentions the hall or school of Tyrannus, where Paul taught daily for two years during his Ephesian ministry. Tyrannus may have been a philosopher or teacher who owned or operated this lecture hall, which Paul apparently rented or borrowed. Some manuscripts add that Paul taught from the fifth to tenth hour—during the midday break when the hall would otherwise be unused. The detail provides glimpses of Paul's strategic adaptation: he used available venues and teaching times to maximize his opportunity for gospel proclamation.