These are Thoroughbreds:
https://www.google.nl/search?q="grand+steeple+chase+de+paris"&hl=nl&rlz=1T4MERD_nlNL503NL503&source=lnms&tbm=isch&sa=X&ei=MmIUVceiG8OvU6yjg8AI&ved=0CAkQ_AUoAw&biw=1600&bih=698
And a number of these are also Thoroughbreds:
https://www.google.nl/search?q="grand+steeple+chase+de+paris"&hl=nl&rlz=1T4MERD_nlNL503NL503&source=lnms&tbm=isch&sa=X&ei=MmIUVceiG8OvU6yjg8AI&ved=0CAkQ_AUoAw&biw=1600&bih=698#hl=nl&tbm=isch&q=puissance+thoroughbred&imgdii=_
Cumano, I do not understand what you are saying when you say: they were winning 50 years ago and they are still winning now.