Which papal secretary gave a 1533 Rome lecture on Copernicus's heliocentric theory?

Johann Albrecht Widmannstetter gave a 1533 Rome lecture on Nicolaus Copernicus’s heliocentric theory.

Widmannstetter was a German humanist, linguist, diplomat, and scholar who became a papal secretary. In Rome, he presented Copernicus’s revolutionary claim that Earth moves around the Sun rather than occupying the universe’s fixed center. His lectures attracted the interest of Pope Clement VII and several cardinals.

The lectures probably drew largely on Copernicus’s early outline, the Commentariolus, rather than the full De revolutionibus. Copernicus’s major book was not published until 1543, shortly before his death, despite encouragement from supporters. Widmannstetter’s lectures therefore helped circulate Copernican ideas before the landmark book appeared.

A common mix-up is with Andreas Osiander, who wrote the anonymous preface to De revolutionibus, or Erasmus Reinhold, who later produced influential astronomical tables. Tiedemann Giese was another important Copernican supporter, but he was the bishop and friend who urged Copernicus to publish.