What materials did Charles Garnier use to build the Paris opera house?

Charles Garnier used a variety of materials to construct the Paris Opera House, including limestone for the façade, which gives the building its striking appearance. The interior features marble from various regions, including Carrara, and ornate decorations made from gold leaf. The use of iron for structural support was also significant, allowing for the grand scale and intricate designs of the opera house. Additionally, glass and mirrors were employed to enhance the building's luminosity and opulence.