Baron Theophil Edvard von Hansen (German: ['te?ofi?l f?n 'hanzn?]; original Danish name: Theophilus Hansen pronounced [t?eo'fi?lus 'hæn?sn?]; 13 July 1813, in Copenhagen – 17 February 1891, in Vienna) was a Danish architect who later became an Austrian citizen.
He became particularly well known for his buildings and structures in Athens and Vienna, and is considered an outstanding representative of neoclassicism.