Categories - Royalty, Rulers, Nobility
- Abahai
- Abdication of Charles V
- Abū al-ʿAbbās
- Accession of Frederick the Great
- Act of Supremacy
- Afonso I
- Agesilaus II of Sparta
- Akbar
- Akhenaton
- Akihito
- Alboin
- Alexander I
- Alexander II
- Alexander Nevsky
- Alexander the Great
- Alexander the Great Begins Expansion of Macedonia
- Alexander the Great Invades the Indian Subcontinent
- Alexius I Comnenus
- Alfonso VIII
- Alfonso X
- Alfred the Great
- Almoravid Empire
- Alp Arslan
- Amenhotep III
- Anawrahta
- Anne Boleyn
- Antigonus I Monophthalmos
- Antiochus the Great
- Ardashīr I Establishes the Sāsānian Empire
- Armenian Empire Reaches Its Peak Under Tigranes the Great
- Árpád
- Arsinoe II Philadelphus
- Artemisia I
- Ashurbanipal
- Ashurnasirpal II
- Aśoka
- Aśoka Reigns over India
- Atossa
- Attila
- Augustus
- Aurangzeb
- Aztec Empire
- Bābur
- Babylonian Empire
- Baptism of Clovis
- Barons’ War
- Basil the Macedonian
- Battle of Bosworth
- Battle of the Nations
- Baybars I
