There was still one more heavy cruiser that could be built under the restrictions of the Washington Treaty and in the 1925 Program a new design was envisioned that would have better protection than the Duquesne class.
An order for the Suffren was placed on November 1, 1925. Under the 1926 Program the Colbert was ordered on March 1, 1927. In 1927 the Foch was ordered to be built. On April 1, 1929 the Foch was ordered.
To launch the aircraft there were two catapults. The initial aircraft carried were Loire-Nieuport 130s.
On the Suffren the catapults were placed behind the funnels and only two aircraft could be carried.
On the Colbert the catapults were placed between the funnels and three aircraft could be carried.