For the sake of lightness and simplicity (i.e. cheap and unimaginative) the 60s and 70s were the years of doors that are mere panels of clear glass. For some time, creativity has been showing signs of a revival.
First of all, the (old) building which houses a benefits centre shows that Social Security is not necessarily all red-tape and stick-in-the-mud; then the building (also an old one) which used to be the Customs Headquarters before it was sold and revamped now has amazing doors; it’s a shame that that the designer and contractor had forgotten that we put locks on doors which explains the
hideous yellow bike chain !
Others are less spectacular but are original. The door at Quai de Jemappes echoes that by Patout (architect) at 5, rue du Dr.Blanche.
see also: "Art Nouveau" doorways and Doorways of the 1920s and the 1930s