Complex sentence: The position of Keeper of the Archives at the University of Oxford dates from 1634, although the university's records pre-date this, and it claims to have one of the longest continuous record-keeping traditions in Britain.
Split into simpler sentences: The position of Keeper of the Archives at the University of Oxford dates from 1634. The university's records pre-date this, and it claims to have one of the longest continuous record-keeping traditions in Britain.