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abacus
abbey
Abdera
abstract art
Abu Simbel
Abu'l Wafa (AD 940–998)
Achaeans
Acheron
Acheulian
Achilles
acropolis
Acropolis, The
acroteria
Actaeon
Actium, Battle of
Adonis
adytum
Aegean civilization
Aeneas
aeolipile
Africa in the 19th century
Africa Kush and Axum
African empires 500 to 1500
agalma
Age of Discovery
agglutinative languages
agora
Agricola, Gnaeus Julius
agriculture, beginnings
agriculture, history
Alcazar
alchemy
Alcibiades
Alexander Severus
Alexander the Great
Alexandria
Alhambra
Allia
alphabet
Alpheus
Amalthea
Amazons
Ambracia
ambrosia
Amenthes
American Civil War
AMERICAN HISTORY
American War of Independence
Americas: conquest and settlement
Ammianus Marcellinus
Ammonius
Amphictyonic Council
Amphion
Amphipolis
amphitheater
Amphitrite
Amphitryon
amphora
ampulla
amulet
Anabasis
Anasazi
Anaxagoras of Clazomenae (c. 500–c. 428 BC)
Anaximander of Miletus (c. 610–c. 540 BC)
Anaximenes of Miletus (c. 585–525 BC)
ANCIENT GREEK HISTORY
ancient libraries
ancient science
ancilla
Andromeda
Angles
Anglo-Saxon conquest of Britain
Anglo-Saxon England to 1066
Anglo-Saxon monarchy
Anglo-Saxon settlement
annulet
Antikythera mechanism
Antiope
Aphrodite
apobate
apotheosis
Appian Way
aqueduct
arabesque
Arabian astronomy
Arabs and the rise of Islam
araeostyle
arblast
Arcadia
arch
archeoastronomy
archeology
Archimedes (c. 287–212 BC)
ARCHITECTURE, HISTORY
architecture after 1930
architrave
Archytas (c. 428–c.350 BC)
Aristarchus of Samos (c. 320–c. 250 BC)
Aristotle (384–322 BC)
Armada, Spanish
armor
armorplate
army, Roman
art and architecture in the 17th century
ART AND SCULPTURE, HISTORY
Artabazus
Artaxerxes
Arthur, King
artillery
aryballus
Asgard
Asian empires of the Mongols
ASIAN HISTORY
Assyrian civilization
Assyrians 1530 to 612 BC
ASTRONOMY, HISTORY
Atlantis, legend of
atomism
atrium
Attila and the Huns
Augustus
Augustus to Nero
Aurignacian
Austerlitz, Battle of
Australia and New Zealand to 1918
automatic weapons
Avalon
Aventine
Averroës (1126–1198)
Aztecs