Building Name: Basilica of Brasilia.
Architect: Oscar Niemeyer.
Location: Brasilia, Brazil.
Capacity of holding 4 0,000 people.
The Cathedral of Brasilia is the Roman Catholic cathedral. The Cathedral is a hyperboloid structure constructed from 16 concrete columns , weighing 90 tons each.
Source: https://en.wikipedia.org/wiki/File:Brasilia_cathedral_2007.jpg
Most of the Cathedral is below ground with only 70 meter diameter and 42 meter roof of the Cathedral. Inside the Cathedral over the Nave are sculptures of three angels, suspended by steel columns.
Interiors of the Cathedral.
Source link:
https://assets.atlasobscura.com/media/W1siZiIsInVwbG9hZHMvcGxhY2VfaW1hZ2VzL21rbTdpcTlxNzdrM2M2ODJmZDYzODYyN2VhZmMxX0NhdGhlZHJhbF9vZl9CcmFzaWxpYV83LmpwZyJdLFsicCIsInRodW1iIiwiMTIwMHg-Il0sWyJwIiwiY29udmVydCIsIi1xdWFsaXR5IDgxIC1hdXRvLW9yaWVudCJdXQ/Cathedral_of_Brasilia_7.jpg
Visitors enter into the Cathedral through a dark tunnel and emerge into a bright space with glass roof.
(Information from Wikipedia.)
Material : Concrete
Weight: 90 tons each.
PLAN OF THE BUILDING.