Thrown Over a Castle Wall: Guido de Brès and the Belgic Confession

Late in 1561, a copy of a new confession of faith was thrown over the wall of the castle at Doornik (Tournai), in the hope that it would reach the local governor and persuade him that the Reformed Christians in his territory were not the dangerous radicals the authorities assumed them to be. Its author, a preacher named Guido de Brès, would be captured and hanged six years later for the faith he had tried so carefully to defend. Understanding the Belgic Confession means understanding just how dangerous it was to write it.

Christians Under Suspicion

By the 1560s, the Low Countries — roughly modern Belgium and the Netherlands — were under the rule of Spain's Catholic Habsburg monarchy, which viewed Protestant dissent with deep suspicion and, at various points, brutal repression. Reformed Christianity had spread rapidly through the region, but it faced a specific problem beyond ordinary religious persecution: it was frequently lumped together, in the minds of Catholic authorities, with the Anabaptist movement, whose radical wing had been associated with real political violence and social upheaval in earlier decades, most infamously at Münster in the 1530s.

This was an existential branding problem as much as a theological one. If Reformed Christians in the Low Countries were seen as cut from the same cloth as violent revolutionaries, no argument about doctrine would save them from the authorities' wrath.

Writing to Prove Loyalty

Guido de Brès, a preacher who had studied under Reformed leaders including John Calvin's circle in Geneva, set out to solve this problem directly. The Belgic Confession he authored — modeled partly on the French Confession of Faith used by Calvinist churches in France — makes a point of explicitly rejecting Anabaptist positions on issues like infant baptism, civil government, and the swearing of oaths, precisely to draw a clear, unmistakable line between Reformed conviction and the radical movements the authorities feared.

Article 36 of the confession goes so far as to affirm that civil government is a good and necessary institution ordained by God, and that Christians owe it obedience — language chosen deliberately to demonstrate that Reformed Christians were loyal subjects seeking freedom of conscience, not revolutionaries seeking to overthrow the social order.

A Confession That Could Not Save Its Author

The strategy did not work, at least not for de Brès himself. Persecution in the Low Countries intensified rather than eased in the years following the confession's composition. De Brès continued preaching and pastoring Reformed congregations despite the danger, and in 1567, following his involvement in the tumultuous events of the Dutch Revolt's early years, he was captured, imprisoned, and executed by hanging.

His confession, however, outlived him by centuries. It was formally adopted by Reformed synods in the years that followed and, at the great international Synod of Dort in 1618–19, was affirmed alongside the Heidelberg Catechism as one of the doctrinal standards binding the Dutch Reformed Church — a status it retains in Reformed churches worldwide to this day.

Part of a Wider Story

De Brès did not write in isolation. He was working in explicit continuity with the Augsburg Confession, written a generation earlier under the pressure of imperial politics rather than direct persecution, and in close historical proximity to the Heidelberg Catechism, composed in the same decade just across the border in the Palatinate, facing its own version of the era's confessional pressures. Together with the later Canons of Dort and the Westminster Confession, these documents form the wider international Reformed family this confession belongs to — a family whose confessions were written, again and again, not as abstract theology but as documents drafted under real and often mortal risk.

The Belgic Confession's opening articles on the knowledge of God and the authority of Scripture read, on the page, like careful systematic theology. Behind them stands a preacher who threw his life's convictions over a castle wall, hoping to be believed — and who, when he was not, paid for those convictions with his life.

Read more from this era: [the Augsburg Confession's imperial context](https://augsburgconfession.info/blog/augsburg-confession-diet-of-augsburg-ottoman-threat), [the Heidelberg Catechism's story](https://heidelbergcatechism.net/blog/heidelberg-catechism-frederick-iii-peace-of-augsburg), and [the international Reformed family](https://reformedconfession.com/blog/reformed-family-synod-of-dort-international-reformation).