The Duomo di Milano (built here in LEGO by Bright Bricks for Nano Bleu Toys in Milan) was begun in 1386 and completed just in 1965. This cathedral is the fifth largest church in the world and the largest in Italy (though remember that the Vatican is a separate country - St Peters is the largest Christian church in the world), and I can testify that it is massive. I was there once and the columns reminded me most of the giant sequoia trees at Yosemite National Park. This model is built at a 1:200 scale and took the builders much less than the six centuries of the original, just an amazing ten days(!).