Letters written by Copernicus
- 1518 X 22 Copernicus to the Varmia Chapter
- 1524 II 29 Copernicus to Bishop Ferber
- 1526 IV 8 Copernicus to Canon Felix Reich
- 1531 VII 27 Copernicus to Bishop Ferber
- 1533 IV 11 Copernicus to Bishop Dantiscus
- 1536 VI 8 Copernicus to Bishop Dantiscus
- 1537 VIII 9 Copernicus to Bishop Dantiscus
- 1538 IV 25 Copernicus to Bishop Dantiscus
- 1538 XII 2 Copernicus to Bishop Dantiscus
- 1539 I 11 Copernicus to Bishop Dantiscus
- 1539 III 3 Copernicus to Bishop Dantiscus
- 1539 III 11 Copernicus to Bishop Dantiscus
- 1541 VI 15 Copernicus to Duke Albrecht of Prussia
- 1541 VI 21 Copernicus to Duke Albrecht of Prussia
- 1541 VI 27 Copernicus to Bishop Dantiscus
- 1541 IX 28 Copernicus to Bishop Dantiscus