Original sentence: In 1497 his uncle was ordained the bishop of Warmia (German: Ermland), and Copernicus was named a canon in Frauenburg's cathedral, but he waited in Italy for the great Jubilee of 1500, so he went to Rome where he observed a lunar eclipse and gave some lessons of astronomy or math
Edited sentence: In 1497 his uncle was ordained the bishop of Warmia (German: Ermland), and Copernicus was named a canon in Frauenburg's cathedral, but he waited in Italy for the great Jubilee of 1500, so he went to Rome where he observed a lunar eclipse and gave some lessons of astronomy or math (unfortunately nothing of this remains to us)