Johann is mentioned several times, between 1453 and 1484, in documents from Münster, including invoices for altarpieces and as a witness to marriages and other legal contracts.
[1] He was the first painter in that area to use a style introduced in the Netherlands by Robert Campin; later brought to fruition by Jan van Eyck and Dirk Bouts.
This style involves the use of bright colors, attention to detail, heads with individual characteristics and an intuitive approach to perspective.
Copies, arranged as they would have appeared originally, are in the current Abbey Church [de].. Few of his works created after 1470 can be attributed with any degree of certainty.
An altarpiece panel at the Cleveland Museum of Art, originally thought to be his, has been tentatively reattributed to an unnamed Master.