What 3 stone were used?
Tufa, limestone and travertine
What marble was used?
White marble and coloured marble
What was tufa?
Solidified volcanic mud
Strength of limestone?
Fire-resistant
What happens to travertine when its exposed to air?
Hardens
What colours could the coloured marble be?
Yellow, green, grey and red
What was a benefit of concrete over stone?
Cheaper
What is concrete made out of?
Its a mortar, made of lime, sand and water
What is opus incertum?
Wall facing consisting of small stones set irregularly
What were walls made out of?
Aggregate consisting of rubble