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1780 CE: First scientific archaeological excavations attributed to US President Thomas Jefferson.
1819 CE: C. J. Thomsen of the Danish National Museum first used the Three-Age System of Stone Age, Bronze Age and Iron Age to organise its collection.
1822 CE: Champollion announces decipherment of hieroglyphic writing.
1828 CE: First excavations begun at Clava Cairns.
1828 CE - 1990 CE: Ongoing excavations at Clava Cairns.
1850 CE - 1913 CE: Excavations are on-going at the Skara Brae site.
1860 CE: Frank Calvert, then Heinrich Schliemann beginning in 1871, excavate at the site of ancient Troy.
1876 CE: Heinrich Schliemann begins excavating at Mycenae.
1900 CE - 1905 CE: Sir Arthur Evans excavates at Crete, discovering the palace at Knossos and naming the civilization "Minoan".
1902 CE - 1914 CE: The Ishtar Gate excavation is underway and lead by Robert Koldewey.
1913 CE: Skara Brae site is plundered by unknown parties.
1920 CE: English archaeologist Sir Leonard Woolley excavates at Ur (in modern day Iraq).
1922 CE: English archaeologist Howard Carter discovered tomb of Egyptian Pharaoh Tutankhamun.
1927 CE: Professional excavation and preservation efforts begin at Skara Brae under V. G. Childe and J.W. Paterson.
1930 CE: The reconstruction of the Ishtar Gate is completed at the Pergamon Museum in Berlin, Germany.
1960 CE: Beginnings of processual archaeology, a scientific approach to questions and designing of models to suggest answers and test theories, in the US.
1970 CE: The Sweet Track found during peat excavations, Somerset, Britain.
1984 CE: Lindow Man discovered at Lindow Moss, a peat bog in Cheshire, England.
1999 CE: Skara Brae declared a World Heritage Site by UNESCO.