Jan (Latin: Johannes) was the first bishop of Wrocław. He took power over the diocese of Wrocław at the time of its establishment in the year 1000.^[1] All numbering of the bishops dates from this time which is why he is not known as Jan I.

He had a brick cathedral built to replace an older wooden church, but this was destroyed in a pagan revolt in 1031, and the diocese ceased to function. The diocese was re-established in 1050 with Hieronim as Bishop.