Hittite empire in Hattusa, Anatolia.
1900 BC: Transition from Early Helladic III to Middle Helladic culture in Greece.
c. 1900 BC: Minoan Old Palace (Protopalatial) period starts in Crete.
c. 1900 BC: Fall of last Sumerian dynasty.
c. 1900 BC: Late Harappan Phase of the Indus Valley Civilization begins
c. 1900 BC: The Mokaya along the Pacific coast of present-day Chiapas, Mexico were preparing cacao beverages.
c. 1900 BC: Port of Lothal is abandoned.
c. 1897 BC: Senwosret II (Twelfth Dynasty) started to rule. He built Kahun near his pyramide tomb complex at el-Lahun.
c. 1895 BC–1878 BC: "Pectoral of Senwosret II", from the tomb of princess Sithathoryunet at el-Lahun was made. Twelfth Dynasty. It is now in the Metropolitan Museum of Art, New York.
c. 1880 BC: Pharaoh Senwosret II starts to rule (other date is 1897 BC).
1878 BC: Senwosret II (Twelfth Dynasty) died.
c. 1878 BC: Senwosret III (Twelfth Dynasty) started to rule.
1876 BC: Israelites enter Egypt after two years of famine (according to one interpretation of internal Biblical chronology; an alternate date is 1986 BC).
c. 1874 BC: Pharaoh Senwosret II dies (other date is 1878 BC).
c. 1874 BC: Pharaoh Senwosret III starts to rule (other date is 1878 BC).
c. 1860 BC: Senusret III inspects the Nubian frontier, he leads four punitive campaigns against the Nubians.
c. 1855 BC: Pharaoh Senwosret III dies (other date is 1839 BC).
c. 1839 BC: Senwosret III (Twelfth Dynasty) died.
1836 BC-1818 BC: Head of Senusret III is made. Twelfth dynasty of Egypt. It is now kept at The Nelson-Atkins Museum of Art, Kansas City, Missouri.
1807 BC–1797 BC—Amenemhat III of Egypt
1806 BC-1802 BC—Sobekneferu of Egypt
19th century BC Wikipedia
The 19th century BC was the century which lasted from 1900 BC to 1801 BC.