Estácio de Sá (1520–1567) was a Portuguese soldier and officer who went to the colony of Brazil, on orders of the Portuguese crown, to wage war on the French colonists commanded by Nicolas Durand de Villegaignon. These French colonists had established themselves in 1555 at Guanabara Bay in Rio de Janeiro, in a settlement known as France Antarctique. He was the founder of Rio de Janeiro, now the second largest city in Brazil.