Byzantine science served as a bridge between the Islamic world and Renaissance Italy in the transfer of classical knowledge and in the transfer of Islamic science to Renaissance Italy. The rich historiographical tradition made it possible to use old classical knowledge in art, architecture, literature, and technology development. The Byzantines were the pioneers of many technological developments. Byzantine science was actually classical science. It was closely connected with Ancient Greek philosophy and metaphysics. Byzantine mathematicians adhered to and continued the Ancient Greek tradition. In the early periods of Byzantium, Isidorus and Anthemios built the Hagia Sophia with the formulas used by two famous mathematicians. In the following centuries mathematicians such as Mihail Psellos blended philosophy and mathematics.