Amphitheatre and solar panel: what they have in common

1. Step 1. Amphitheatre — has part — Arch. Arcades.
2. Step 2. Arch — evolved into — Vault. An extended arch.
3. Step 3. Vault — is part of — Gothic cathedral. Rib vaults.
4. Step 4. Gothic cathedral — has part — Window glass. Stained glass.
5. Step 5. Window glass — is part of — Solar panel. Tempered cover glass.

Open Evothings