Did Moving the Capital to Constantinople Weaken the Eastern Empire?

No—it strengthened it. Constantine's 330 AD founding of Constantinople as Nova Roma bolstered the eastern half for over a millennium.

Why It Strengthened the East

1. Strategic Geography: Peninsula with Golden Horn harbor; commanding Bosphorus trade choke point.
2. Defensible: Theodosian Walls (5th c.) repelled sieges for 1,000+ years.
3. Administrative Efficiency: Closer to eastern provinces, Persian frontier, grain supply (Egypt), troop recruitment (Balkans, Anatolia).
4. Economic Engine: Trade hub between Europe/Asia; wealth funded armies, bureaucracy, diplomacy.
5. Cultural Magnet: Greek, Roman, Christian, Eastern synthesis—intellectual/artistic center.
6. Resource Base: Anatolian agriculture, mines, manpower.

The West Declined Separately

Rome's loss of revenue, troop withdrawals, and barbarian pressure weakened Italy—but the East thrived. The "weakening" narrative confuses the West's collapse with the East's rise.

Constantinople fell only in 1453 (Ottomans)—1,123 years after dedication.