The colophon contains information about a book's publisher, the typesetting, printer, and possibly even includes a printer's device.
The term colophon is Latin for top, summit or finishing. In early books, the colophon was usually found at the end of the text, register, or index. Later this became known as the title page.
Modern books still contain the colophon, often located at the end of the text or on the verso of the title-leaf. Modern colophon often include data such as printing company, the typefaces used, the ink and paper, if it was printed on recycled paper, etc.
Example of Colophon: