 After the liberation of Paris in 1945, Lahner returned to rue des Perichaux where he began to exhibit his work more frequently.In 1948 he made his first of many trips to Algeria where the Averseng family commissioned him, to design a chapel for the town of El Affroun.This assignment provided an opportunity for Lahner to participate in the fascination with chapel construction and adornment that was then popular in France.