The French invaded Algeria in 1830, and found a landscape rich in Roman remains, which they proceeded to re-use to support the constructions such as fortresses, barracks and hospitals needed to fight the natives (who continued to object to their presence), and to house the various colonisation projects with which they intended to solidify their hold on the country, and to make it both modern and profitable. Arabs and Berbers had occasionally made use of the ruins, but it was still a Roman and Early Christian landscape when the French arrived. In the space of two generations, this was destroyed, just as were many ancient remains in France, in part because "real" architecture was Greek, not Roman.--