What cistern is made of
A reservoir for storing water.
- Reservoir — has part. A container for water.
- Waterproof plaster lining — has part. Plaster on hydraulic mortar.
- Gutter — uses. Water is collected from roofs and squares.
- Roman concrete — is made of. Roman cisterns were built of concrete with hydraulic mortar.
- Stone — is made of. Cisterns were cut into rock or lined with stone.
- Lime — is made of. The walls were coated with lime plaster against leaks.