| The territory of the former Federal District became its own state, Guanabara, after the bay that borders it to the east, encompassing just the city of Rio de Janeiro. |
| The Guanabara Bay has lost mangrove areas and suffers from residues from domestic and industrial sewage, oils and heavy metals. |
| In 1555, one of the islands of Guanabara Bay, now called Villegagnon Island, was occupied by 500 French colonists under the French admiral Nicolas Durand de Villegaignon. |
| Subsequently, the French would resettle in Portuguese territory at Guanabara Bay, which would be called France Antarctique. |
| This document, the Guanabara Confession of Faith, became the first Protestant confession of faith in the whole of the Americas. |
| Rio de Janeiro or Guanabara, beside which stands the capital of the republic. |
