Plan | Ceiling (Roof) | Ceiling Arch | Cupola | Bad-gir | Period of Development |
---|---|---|---|---|---|
Rectangular | Domical Vault Roof (DVR) | √ | √ | - | Before Timurids (BT): –AC 1370 (Before Kurts: –AC 1243), Kurts: AC 1244–1381 |
Square | Domed Roof (DR): pendentive or squinch | - | - | √ | Timurids (T), AC 1370-1507 |
Rectangular | Barrel Vault Roof (BVR) | - | - | After Timurids (AT), 1507–present (Safavids: AC 1501–1736, Duranids: 1747–1826) |