Rom 1:8

1:8 I thank my God. Gratitude for God’s work of grace in others was a constant feature of Paul’s life (1 Cor. 11:4; Phil. 1:3; Col. 1:3; 1 Thess. 1:2; 2 Thess. 1:3; 2 Tim. 3:1; Philem. 4).

in all the world. News had spread to the entire empire of the presence of Christians in its capital city.