He's talking about the thousand years having been in the past, during the time of Tartaria and all the incredible architecture. historians would have us believe that the grandeur of that time was built by a primitive people. Though many of the buildings from that time have been destroyed, some that remain have had the dates that were chiseled into the stone of the entrances altered. much of the destruction took place at the end of the 1800s. Presumably, that would make this the time of "the little season" when satan is loosed for a short time upon the Earth to try those who remain.