He is known for his reinforced concrete religious buildings such as the Église Sainte-Thérèse-de-l'Enfant-Jésus in Élisabethville (Yvelines), with extensive sculptural work by sculptor Carlo Sarrabezolles. Also, Tournon designed the Église du Saint-Esprit in Paris, Cathédrale du Sacré-Cœur in Casablanca and several churches in Morocco.