[3] He published in 1941 an illustrated booklet entitled Histoires de peintres racontées et illustrées par Firmin Baes containing anecdotes relating to painters and their work.

From 1888 to 1894, Baes was enrolled at the Académie Royale des Beaux-Arts in Brussels, where he studied at same time as Emile Fabry and Victor Rousseau, who became his friends.

He became close to the group of artists around the magazine Pour l'Art which was published by Octave Maus, Edmond Picard and Emile Verhaeren.

In 1898, Firmin Baes joined the group which already counted Jean Delville, Victor Rousseau, Hector Thys, Emile Fabry and others as its members.

In 1900, he exhibited at the show Pour l'Art an oil on canvas painting of Archers with which later that year he obtained the bronze medal at the World's fair of Paris.

[2] With workers of his father, Firmin Baes developed a pastel technique on canvas which contributed in large part to his fame.

The new techniques allowed the application of a powder, with the tip of the thumb or the little finger, to creates a discreet or vigorous aspect to the tone as well as a velvety delicacy to his compositions.

[7] Firmin Baes was a prolific artist who painted, made works in pastel and designed prints and posters.