This was designed by the famous Hungarian architect Ödön Lechner in the Secession style, a variation of Art Nouveau that incorporates elements of Hungarian folk art and which became the Hungarian national style. Masterpieces by Lechner include the Geology Institute http://www.pbase.com/helenpb/image/130482111, the Postal Savings Bank http://www.pbase.com/helenpb/image/130678536, Szent Laszlo Church http://www.pbase.com/helenpb/image/130490945, a villa http://www.pbase.com/helenpb/image/130489212, Kecskemet City Hall http://www.pbase.com/helenpb/image/130648750 and the Applied Arts Museum http://www.pbase.com/image/128557313.

Information on Lechner is here: http://en.wikipedia.org/wiki/Ödön_Lechner

This building reminded me of the Postal Savings Bank in Budapest http://www.pbase.com/helenpb/image/130678536; the moment I saw this place (and we stumbled on it quite by accident), I knew he had designed it.