ANCIENT OLYMPIA, Greece - The London 2012 Olympics torch was lit by the sun's rays in ancient Olympia on Thursday, kicking off a relay that will culminate with the lighting of the Olympic stadium's cauldron during the opening ceremony on July 27.

Here are five facts about the torch:

* Dubbed the "cheesegrater", it is perforated with 8,000 holes that represent each person who will carry it on the British leg of the torch relay.

* Its triangular shape symbolizes the three times that London has been awarded the Games in 1908, 1948 and 2012; the faster, higher stronger motto of the Olympic movement and the sport, education and culture triple vision of the 2012 Games.

* The gold-colored torch is made up of an inner and an outer aluminium alloy skin held in place by a cast top piece and base.

* Laser cutting of 8,000 circular holes into each torch was done at a rate of 16 every second - the lack of such technology in the past would have prevented such a torch from being used for the Olympics.

* The torch weighs 1kg including the burner and gas canister and stands 800 millimeter high.