This is a visualization of cross references within the Christian scriptures. It began as a study of Bible passages that refer to other passages, and was developed in a graphical way that has its own sense of majesty and beauty.
From the website:
Due to the extremely high number of cross-references, this lands more on the aesthetic side of the information visualization spectrum. Different colors are used for various arc lengths, creating a rainbow like effect. The bar graph running along the bottom shows every chapter in the Bible and their respective lengths (in verses). Books alternate in color between white and light gray.