Why does Paris look the way it does? Well, until the year 1853 it was a diseased and overcrowded Medieval city — then the biggest urban renovation in history was announced. This is the story of how Paris was transformed into the world's most popular city... https://t.co/tjyV7RvWlK

Timeline

1990: Problem recognized

2007: Location selected

2008: Architects selected

2011: Schematic design completed

2013: Construction starts

2017: Construction ends; library opens