Goswin Anne-Marie Félix de Fierlant (ca.
He began his public career with the city council of Brussels.
[1] By letters patent of 26 December 1773, Fierlant was appointed president of the Great Council, and the following January he was also made a Councillor of State.
In 1787, during the reforms of Joseph II, he was transferred to Brussels as head of a new Council of Appeal, but when this project was abandoned he was reinstated as president of the Great Council, retaining the position throughout the political changes of the Brabant Revolution (1788—1793).
In 1793, at the second Austrian restoration, he was appointed Chief President of the Privy Council.