The term "Rum" among the Arabs includes the Romans and their Byzantine successors. The Byzantines consider themselves Romans, and their capital is "New Rome", meaning Constantinople. The Greek Orthodox still call Constantinople the center of the Ecumenical Patriarch "New Rome" to this day.
The primary references to the history of the Romans are many and varied, including the dates that were classified in times contemporary with the occurrence of the events, or shortly after them, including the diplomatic messages that were exchanged in those eras between the Romans and other peoples and countries, including the laws that were enacted, the inscriptions that were installed, and the money that was minted, Some of them are specifically classified for research into church news.
The Romans adopted the culture of the ancient Greeks, which paid great attention to human thought, and cared for man and his happiness with true happiness. So the Romans shouldered the burden of preserving this culture and transmitting it to us, to the point that they preserved its original texts and added to them.