The antiquity and civilization of the Sumerians are so great that even the Greeks did not know about this people until centuries ago. Only a Babylonian historian from 25 BC has told a story in his writings that has a reference to this people, saying (giant humans led by the name of Evans took the name of the Persian Gulf and brought the arts of agriculture - metalworking and the need for writing to themselves. And since then, no new invention has emerged.) It was in the 17th century that the great Westerners began to study the ancient civilization of the East and Mesopotamia, and in their research and exploration of various regions, they noticed the Babylonian bricks with unknown letters engraved on them and began to search. They gradually found the remains in the ruins and hills and continued their exploration. In 1843, the French first began to explore in Khorramabad, and together with an Englishman named General Henry Layard, they began to excavate in Nimrud and Nineveh, following the example of Buta. At the same time, linguistic and calligraphy research on the Persepolis inscriptions had begun, and the first two languages, which were called Old Persian and Elamite, were deciphered, and the third language was deciphered in the 19th century, and it was determined that the third Semitic language, which the Academy is famous for, paved the way for Mesopotamian antiquity. 
European countries took the valuable and exquisite objects they had found with them to Europe during excavations, and they set up museums such as Lore and wrote good reports of their work, and they also found tablets of Sumerian script and language. 
Following the discoveries in 1854, English archaeologists found the site of the Sumerian city of Ur-Eridu-Uruk and found exquisite objects such as the statue of Goda and two cylinder seals with Sumerian script. 
Historical artifacts were discovered in the 19th century in Sumer, from the ruins of the city of Lagash, which had many inscriptions, to the richest documents of script and language, more than 50 thousand tablets or books that described the Sumerian civilization. 
The most recent works obtained are at the same time as the Sumerians, which were 4500 years BC. The discoveries of 2007 were in Jiroft, when the country was invaded by uncultured people from the region and was quickly destroyed. The Sumerians were richer and to this day the Sumerians are known as the oldest people in the world. They lived around 360 centuries BC, when the Amorites - Kassians - Assyrians - Kalvanians - Assyria and Babylonians, all survivors, may be Sumerians.