Jan Maes or Joannes Masius (active 1566–1615) was a printer and bookseller in the university town of Leuven in the Habsburg Netherlands.
Masius, a native of Leuven, moved to Antwerp to work for Christopher Plantin at the Plantin Press in 1566.
[1][2] He left Plantin in 1567 and in 1570 he was licensed as a printer in the city of Leuven.
[2] One of his sons, Joannes Masius the Younger, became a printer-bookseller in Ath; another, Bernard or Bernardin, took over his business in Leuven in 1616.
This article about a person from the Netherlands is a stub.