"Eight supports set into the foundations and a shell with some beautiful additions that nonetheless are structurally significant. These [cylindrical sheets] that hang over the building's doors add more strength to the shell roof. ...[T]his building is a spherical shell roof on eight supports. The roof is the most important part of the building. ...It's a roof with entry doors. That's all it is."
January 1, 1970
https://en.wikiquote.org/wiki/Eduardo_Torroja