From Wikipedia

Unlocking The Great Pyramid

Jean-Pierre Houdin (born in 1951) is a French architect perhaps most notable for a theory on pyramid construction that has some chance of being proven correct in 2009 or shortly thereafter.

Houdin was born in Paris in 1951, but he grew up in Abidjan, in Africa, where his father was the director of a construction company. As a small boy, he spent his spare time on construction sites while his mother, who was a doctor, cared for her patients in a bush dispensary. His interest in building and construction grew out of this first period of his life.

Main article: Egyptian pyramid construction techniques

In 1999 Houdin's father, a retired civil engineer, started to develop the idea that the pyramids had been built from the inside. He asked his son, who had experience both in architecture and in three-dimensional graphics, to assist him in his research. During 2000, they met with members of the team who, in 1986, had worked on the mystery of the Pyramid of Khufu under the aegis of the Fondation EDF. Professor Huy Duong Bui showed them plans on which they discovered a what they saw as a construction anomaly which earlier hypotheses could account for.  This anomaly, baptised “the spiral structure”, looked exactly like a ramp built inside the pyramid which could have played a part in its construction. In 2003, his father created the Association of the Construction of the Great Pyramid (ACGP) in order to promote the project. This association enabled him to meet a number of experts.