To me it looks PA Dutch or German. I think it is beautiful!
Or possibly even Polish folk art. In some places here they paint the sides of houses these kinds of designs.
http://www.google.pl/search?q=Polish...ls=org.mozilla:en-US:official&prmd=ivns&tbm=isch&tbo=u&source=univ&sa=X&ei=qCkwTrKnI8Tysgb52ZEL&ved=0CDQQsAQ&biw=771&bih=1009