Double-wythe Catalan vault on iron columns enclosing a surface area of 15 000 m²: Aymerich, Amat i Jover, former textile factory in Terrassa, 1908; architect: Lluís Muncunill

Double-wythe Catalan vault on iron columns enclosing a surface area of 15 000 m²: Aymerich, Amat i Jover, former textile factory in Terrassa, 1908; architect: Lluís Muncunill

Image credit: Frank Kaltenbach