London 2012: Paralympic logo shone on Dover's cliffs
An image of the symbol of the Paralympic Games was projected on to Dover's white cliffs to mark 100 days until the start of the Paralympics.
About 1 million tickets for the Paralympics Games went on sale at 11:00 BST with 4,200 competitors expected.
The opening ceremony will take place on 29 August with Coldplay playing at the closing ceremony on 9 September.
Locog said that the logo was projected on to the cliffs on Thursday when several photographs were taken.
London 2012 - One extraordinary year
The symbol of the Paralympic Games, made up of three agitos in red, blue and green, was first used in 2003.
The agito - meaning "I move" in Latin - represents movement. The three agitos around a central point symbolise athletes coming from all over the world to compete together.
During the closing ceremony of the Athens Paralympic Games in 2004 the symbol was included on the flag handed over to Beijing.
The Paralympic Winter Games in Torino, Italy, in 2006 used agitos as the symbol of a Games for the first time.