Collagen is the name given to a very important group of similar, but not identical, components of human and other animal bodies. It is the principal component of our skin and of the connective tissue holding different parts of our bodies together. There has been a large amount of research, by many good scientists, on the structures of collagen, but I am convinced that the structure patterns that have previously been proposed (including some proposed by me) are seriously in error. In this lecture I shall explain my reasons for this conclusion and shall present a new type of pattern and evidence for its correctness. I shall concentrate on the features and ideas that I expect to be of greatest interest to you.