At the beginning of the twentieth century, Buenos Aires was the second largest Catholic city in the world after Paris. Christianity is still the most prevalently practiced religion in Buenos Aires (~71.4%), a 2019 CONICET survey on religious beliefs and attitudes found that the inhabitants of the Buenos Aires Metropolitan Area (''Área Metropolitana de Buenos Aires'', AMBA) were 56.4% Catholic, 26.2% non-religious and 15% Evangelical; making it the region of the country with the highest proportion of irreligious people. A previous CONICET survey from 2008 had found that 69.1% were Catholic, 18% "indifferent", 9.1% Evangelical, 1.4% Jehovah's Witnesses or Mormons and 2.3% adherents to other religions. The comparison between both surveys reveals that the Buenos Aires Metropolitan Area is the region in which the decline of Catholicism was most pronounced during the last decade.