The European Tour, currently titled as the DP World Tour for sponsorship reasons, and legally the PGA European Tour or the European Tour Group, is the leading men's professional golf tour in Europe. The organisation also operates the European Senior Tour and the developmental Challenge Tour; the second tier of men's professional golf in Europe. The tour's headquarters are at Wentworth Club in Virginia Water, Surrey, England. The European Tour was established by the British-based Professional Golfers' Association (PGA) through the 1970s, and responsibility was transferred to an independent PGA European Tour organisation in 1984.