[1] Feller was initially raised in the Duchy of Luxembourg by his maternal grandfather, after whose death in 1752 he was sent to a Jesuit boarding school in Rheims.

In 1764, the Society of Jesus was suppressed in France and a number of French Jesuits relocated to the Low Countries, putting pressure on the order's resources there.

Feller was therefore sent to continue his theological studies at Tyrnau in the kingdom of Hungary, spending five years there but during that time also travelling in Italy, Poland, Austria and Bohemia.

[1] In 1771 he made his final vows and returned to Belgium, where he continued to discharge his professorial duties at Liège until the papal suppression of the Society of Jesus in 1773.

His Journal historique et littéraire was published in Luxembourg from 1773 to 1788, and in Maastricht and Liège from 1788 to 1794; a total of 62 volumes appeared,[4] edited and in large part written by Feller.