The answer is india ..........
Alexander the Great died unexpectedly in 323 BCE. As a result, the whole empire began to fall, and leaders fought over power and the empire. Artists of this period had a noticeably different vision of art. Art before this time period were characterized as religious and peaceful. Hellenistic art became more realistic. Hellenistic art is known for the expression of pain, anger, and other dark emotions.
Dome.
Pitched brick barrel vault.
Barrel vault.
Groin vaults.
Rib vault.
Fan Vault.
Hyperbolic paraboloids.
