PIGNEROL is a town of Italy in the province of Piedmont, in E. Long. 7. 15. Lat. 44. 45. situated on the river Chizon, 10 miles south-west of Turin, at the foot of the Alps, and the confines of Dauphiny. The town is small, but populous, and extremely well fortified by the king of Sardinia, since the treaty of Utrecht. It is defended by a citadel, on the top of the mountain, near which is the castle of Perouse, which was built at the entrance of the valley of that name.