Sumer was also the site of early [https://en.wikipedia.org/wiki/History_of_writing development of writing], progressing from a stage of proto-writing in the mid 4th millennium BC to [https://en.wikipedia.org/wiki/Sumerian_cuneiform writing proper] in the 3rd millennium BC (see [Jemdet Nasr period]).[https://en.wikipedia.org/wiki/Sumer] | Sumer was also the site of early [https://en.wikipedia.org/wiki/History_of_writing development of writing], progressing from a stage of proto-writing in the mid 4th millennium BC to [https://en.wikipedia.org/wiki/Sumerian_cuneiform writing proper] in the 3rd millennium BC (see [Jemdet Nasr period]).[https://en.wikipedia.org/wiki/Sumer] |