Solomon (French Salomon) Leclercq was born on November 15, 1745 at Boulogne-sur-Mer. In 1767 (at 22), Solomon entered the Institute of the Brothers of the Christian Schools (De La Salle Brothers) — taking the religious name Solomon.
For 25 years (1767–1792), Solomon served the De La Salle Brothers as teacher and Secretary General of the Institute.
During the French Revolution, the Constitutional Clergy Oath of November 27, 1790 required the public oath of loyalty to the Civil Constitution of the Clergy — schismatic from the Catholic Church. Solomon refused the oath — becoming a refractory-priest under the revolutionary law.
Arrested on August 15, 1792, Solomon was imprisoned at the Carmelite Convent of Paris (the former Discalced Carmelite convent, subsequently confiscated by the revolutionary government and converted to prison).
On September 2, 1792, at the September Massacres — the massive revolutionary mob-killing of Catholic clergy and aristocrats in Paris — Solomon was hacked to death at the Carmelite Convent alongside 190+ other Catholic clergy.
Beatified October 17, 1926 by Pope Pius XI; canonized October 16, 2016 by Pope Francis — first canonized De La Salle Brother.