A cone, not a spire
Architect Edgar de Oliveira da Fonseca designed a 75-metre cone, 106 metres across at the base, often compared to a Mayan pyramid.
A concrete cone in downtown Rio that looks nothing like a traditional cathedral, until you step inside. Here's what you're looking at, and what to listen for when you get there.

Architect Edgar de Oliveira da Fonseca designed a 75-metre cone, 106 metres across at the base, often compared to a Mayan pyramid.
Four stained-glass windows run 64 metres from floor to ceiling and meet in a cross of light at the top.
The column-free interior holds about 20,000 people standing.
Between 1964 and 1979.
Architect Edgar de Oliveira da Fonseca.
About 20,000 standing.