He is best known for his Bibliotheca belgica, sive virorum in Belgio vita scriptisque illustrium catalogus (2 vols., Brussels, 1739), a catalogue of Belgian authors and their works.
[1] Foppens was born in Brussels on 17 November 1689, the son of a family of printers.
He was sent to Leuven University in 1704 and graduated Master of Arts in 1706, at the age of 17.
Around 1713 he began lecturing on Philosophy at the university while studying Theology.
In 1715 he graduated Licentiate of Theology and began a clerical career, holding a canonry of the church of St Martin in Aalst, then St. Salvator's Cathedral in Bruges, and finally St. Rumbold's Cathedral in Mechelen.