For the christian world ,evidently,given that it markes two thousand years from the presumed birth of christ (even though we know that christ was definitely not born in the year 0 of our era.)
Since 1300, the Catholic Church has celebrated special years known as ‘holy years’. The celebration of the Holy Year in 2000, which the Church calls the Year of Great Jubilee takes an added significance since it marks two thousand years since the birth of Christ and is the passing of a millennium. In nominating the year 2000 as the Year of Great Jubilee, Pope John Paul has purposely linked it as part of a long tradition of jubilees celebrated by the Jewish people.
For whom is the year 2000 magical? Obviously for the Christian world, as it marks two thousand years since the presumed birth of Christ (although we know that Christ was not born in the year zero). We must use the term "Christian world" and not "Western world" because the Christian world also extends to oriental civilizations, as it belongs to the so-called world of western Israel, which takes into account our system of recording time in terms of the Common Era but, in fact, counts years differently.
During the last half-century, instead, specialization of knowledge has taken over the field of architecture, and the various functions, once to be found in the same man, are now exercised by different men. おねがいすなす。