No, Oxford University was not principally a school for the study of law and physics. While these subjects were and are offered, the University has a much broader range of academic disciplines.

Here's why:

* History: Oxford University dates back to the 12th century. It has a long history of offering diverse subjects, including theology, philosophy, medicine, and the arts.

* Reputation: Oxford is known for its academic excellence across many disciplines, not just law and physics.

* Current Offerings: Today, Oxford offers over 100 different undergraduate and graduate programs in various fields like humanities, social sciences, natural sciences, engineering, and medicine.

While law and physics are important subjects at Oxford, they are not the sole focus of the university.