Londinium was a settlement established on the current site of the City of London in AD47 (confirmed by a dendrochronological study) around a narrow point on the River Thames.
Impact craters are caused when the planet is struck by solid objects travelling at high velocity, producing shock waves and the compression of material to form a circular crater.
The Führerbunker was a subterranean bunker complex in Berlin, Germany, that served as Hitler's final Führer Headquarters in the last months of the Second World War.
Pavlopetri, also called Paulopetri, is a submerged ancient town, located between the islet of Pavlopetri and the Pounta coast of Laconia, on the Peloponnese peninsula in southern Greece.
The area was designated part of the Stonehenge, Avebury and Associated Sites by UNESCO in 1986, in recognition for one of the most architecturally sophisticated stone circles in the world, in addition to the rich Neolithic, and Bronze age remains found nearby, such as the West Kennet Avenue, Beckhampton Avenue, West Kennet Long Barrow, the Sanctuary, and Windmill Hill.
The Roman empire expanded to become one of the largest empires in the ancient world, though still ruled from the city, with an estimated 50 to 90 million inhabitants (roughly 20% of the world's population) and covering 5.0 million square kilometres at its height in AD 117.
The Anglo-Saxons were a people who inhabited Great Britain from the 5th century. They comprise people from Germanic tribes who migrated to the island from continental Europe, their descendants, and indigenous British groups who adopted some aspects of Anglo-Saxon culture and language.
The British Iron Age is a conventional name used in the archaeology of Great Britain, referring to the prehistoric and protohistoric phases of the Iron Age culture of the main island and the smaller islands, typically excluding prehistoric Ireland, which had an independent Iron Age culture of its own.
The names of the Iron Age tribes in Northern Britain were recorded by Roman and Greek historians and geographers, especially Ptolemy. Information from the distribution of coins has also shed light on the extents of the territories of the various groups that occupied the northern territories of the island that the Romans called Caledonia.