Someone outside of Wu Tan once translated it as an ancient altar---hence the Wu Tan(g) Organizatioal Developmental Center became the place upon which the traditional arts were placed .
The guys at Wu Tan USA had the full story but I can't find it.
http://www.wutanusa.org/
When Tony Yang came to the US in 1980, someone made or he brought a banner [you'll find it in Kurt Wong's school too, the banner] and Wu Tan had already been translated to Wu Tang---my own preference is Wu Tan but by the time we evolved publicly, it was too late.
Guys, thanks for the movie/music check!