What are the contributions of the byzantine empire

Constantinople was the heart of the empire, in the most literal sense of the word.  

It was the best defended city in the world for almost a millennium, located on the most strategical place in the world: exactly on the crossing point between Asia and Europe.

john smith was the first englishman to sail around the world. francis bacon served as attorney general and lord chancellor of england. he took up aristotelian ideas, arguing for an empirical, inductive approach, known as the scientific method, which is the foundation of modern scientific inquiry.

raymond can buy special closed cooling containers or a semi-truck with a air conditioned cooling system and an open box for the fruits,