Centers of power are localized regions of the world where political, economic and cultural influence are dominant for a time, hence defining a particular era in a particular sphere of influence.

• Fertile Crescent
  • Mesopotamia
• Ancient India
  • Indus Valley Civilization
  • Maurya Empire
  • Pala Empire
  • Chola Empire
  • Mughal Empire
• Ancient China
  • Qin Dynasty
  • Han Dynasty
  • Tang Dynasty
  • Ming Dynasty
  • Qing Dynasty
• Ancient Iran and Persian Empire
  • Achaemenid Empire
  • Parthian Empire
  • Sassanid Empire
• Ancient Mediterranean
  • Ancient Egypt
  • Ancient Greece and Macedonian Empire
  • Carthage
  • Ancient Rome and Roman Republic
  • Roman Empire
  • Byzantine Empire
• Arab Empire
  • Rashidun Caliphate
  • Umayyad Caliphate and Caliphate of Córdoba
  • Abbasid Caliphate
• Mongol Empire
  • Yuan Dynasty
• Spanish Empire
  • Habsburg Spain
• French Empire
  • French Colonial Empire
• British Empire
• Soviet Union
• American empire, United States of America

• Grammatica Arabica
• Grammatical ambiguity
• Grammatical cases in Sanskrit
• Grammatical context
• Grammatical Gender
• Grammatical gender in German
• Grammaticalise
• Grammaticality judgment task
• Grammaticality rating
• Grammaticality rating task
• Grammatical modification
• Grammatical phrase
• Grammatical predicate
• Grammatical prescription
• Grammatikopoulou
• Grammatophyllum cominsii
• Grammatophyllum fastuosum
• Grammatophyllum giganteum
• Grammatophyllum macranthum
• Grammauta, Stephen
• Gramme (disambiguation)
• Gramme magneto
• Gramme (river)
• Grammia speciose
• Grammion