The modern discipline of classical philology began in Germany at the turn of the nineteenth century. It was during this period that scientific principles of philology began to be put together into a coherent whole, in order to provide a set of rules by which scholars could determine which manuscripts were most accurate. This "new philology", as it was known, centered around the construction of a genealogy of manuscripts, with which a hypothetical common ancestor, closer to the original text than any existing manuscript, could be reconstructed.