The materials produced in writing about a ruler, state, institution or ordinary people and handed over to later ages are called documents. In this sense, clay tablets from the states existed in Mesopotamia are also documents like those written on various tools by the Chinese.
The Ottoman Empire, like the Seljuk Turks it followed, created a very effective tradition of documentation thanks to the bureaucrats it recruited and subsequently trained. Apart from those of the classical period, which were lost due to various natural disasters, almost every document produced since the early modern period was carefully preserved up to this day. The estimated number of documents kept in the State Archives is 100 million today.