The work was put out to tender immediately after this decision. On March 19th, 1922, Jean Castandet, a contractor from Morcenx, won the contract, and on March 31st, 1923, the plans for the amphitheater for Landes-style bullfighting were submitted to a vote by the elected officials.
At the same time, the construction included the planting of 20 plane trees within the arena's perimeter. In the end, rectangular arenas were erected and, for years, they were repaired from the attacks of the famous bullfighters. In 1941, it was decided to demolish them and rebuild in cement… but that was the time of the Occupation.
Finally, the construction of a concrete amphitheater seemed poised to begin in 1948, based on a plan drawn up by the architect André Bergès… but on June 11, 1949, the rapporteur of the Local Festivals Committee explained that this project was too expensive, and the committee was therefore considering the construction of a wooden arena. To this end, the town would have pine trees felled, which local factories would then process, and young athletes from the CAM (Club Athlétique de Landes) would lend their assistance. The project's completion was a lengthy process: the new arena was inaugurated in 1956 with three days of festivities enlivened by the La Cigale brass band, featuring a funfair, a feria, a cycling race, and a public dance. Since then, the formal Landes-style bullfighting has remained the major event of the local festivals. (See the photo of the plan, which is in the Morcenx archives.)
A surprising plaza, it has retained the rectangular layout of the old arena, with trees both inside and out. The plane trees, deemed a nuisance, were cut down in 1958, and in return, the amphitheater was covered. This was also the year Morcenx entered the Landes and Béarn Challenge for the Landes-style bullfighting.
An exceptional construction, the Morcenx-la-Nouvelle arenas are among the largest public open-air entertainment facilities entirely built of wood.