Flemish sculptor, a pupil of Theodoor Verhaegen. He was active mainly in Mechelen where his best works (organ case and benches) can be seen in the Onze-Lieve-Vrouw-over-de-Dijlekerk and the Sint-Janskerk. He sculpted a pulpit for the Sint-Katelijnekerk and several sculptures for the Sint-Romboutscatedraal. Valckx also built a monumental pulpit in the Sint-Germanuskerk in Tienen around 1760. //