Hézelon de Liège

Hézelon de Liège (also Etzelo; floruit second half of the 11th century – first half of the 12th century) was a church official and architect, who at Cluny Abbey oversaw the construction of the abbey church begun in 1088. He came from an aristocratic background and probably received a formal education, in addition to being trained well enough in mathematics and technical skills to be able to work as an architect.