powered the water wheels mounted on the vessel. The innovative use quickly found acceptance among medieval watermillers, reaching Paris and the Frankish Realm only two decades later. The theory of impetus: The theory was introduced by John Philoponus, and it is the precursor to the concepts of inertia, momentum and acceleration. Hospital: The concept of hospital as institution to offer medical care and possibility of a cure for the patients due to the ideals of Christian charity, rather than just merely a place to die, appeared in Byzantine Empire. Separation of conjoined twins: The first known example of separating conjoined twins happened in the Byzantine Empire in the 10th century. A pair of conjoined twins lived in Constantinople for many years when one of them died, so the surgeons in Constantinople decided to remove the body of the dead one. The result was partly successful as the surviving twin lived three days before dying. The fact that the second person survived for few days after separating him was still being mentioned a century and a half later by historians. The next recorded case of separating conjoined twins was 1689 in Germany. See also List of Greek inventions and discoveries Ancient Greek technology References Sources Further reading External links Mlahanas: Byzantine Science and Technology Inventions Byzantine