Giovanni Nanni was an Italian painter and illustrator active in the mid 1915 period of Italian postcard designs.

He is noted for his fashion postcards of beautiful women adorned in wonderful hats and splendid exotic fashions, all wrapped in an Art Deco style that was very early for his day.

While he produced a large amount of postcards, his most interesting and probably best postcard designs are advertising cards for big Italian companies like Pneumatici Pirelli, Fernet Branca, Chierichetti, and others.

Today, Nanni postcards are among the most desired of the brilliant fashion illustrator postcards.